This is a compilation of my undead race addons. This will always be the most up-to-date version.
Banshee
Silence and confuse enemies.
Drift through walls.
Cut away healing.
Banshees begin in a small starting zone of their own.
Banshees are unlocked if you have unlocked any other undead.

Mummy
Embalming increases Strength and Willpower
Entangle wraps up an enemy, slowing them, with a low cooldown.
Inevitability wears away at the resistances of your enemies as your own resistances mount.
Uniquely, they have a small secondary racial tree that removes detrimental effects.
Mummies begin in their own starter zone, a low-level dungeon reminiscent of both the Blighted Scar and the Elven Ruins.
Mummies are initially locked, and unlock by defeating the Mummy Lord

Wight
Blast enemies with elemental power.
Ignore attacks with your ghostly nature.
Unerringly seek out enemies, even behind walls
Wights begin in a tiny starting zone of their own.
Wights are unlocked by completing the ancient battleground event.

And adds a new prodigy for any undead: Dreadmaster

Chinese translation by gooder1029

A full redesign of the Demonologist class, featuring rewritten flavour text, enhanced QoL, some enhanced visuals, and many, many balance and design changes to talents intended to reduce tedium and enhance gameplay diversity while holding true to Demonologist's core gameplay as a heavily-armored melee/caster hybrid.
(Note that this addon requires Ashes of Urh'rok to be both installed and active to work, and will fail to load otherwise.)

Features include:

An entirely new talent tree: Bloodbinding, replacing Combat Techniques and Combat Veteran. Lay down hexing circles to strip foes' strength and restore your stamina, and go for their throats with a deadly gap closer that strikes without fail!

No more tedious sustain management: Osmosis Shield, Rain of Fire, and similar talents have all been reworked so that they only drain your Vim when they directly take effect, preserving their functionality while removing the need to manually toggle them off and on to conserve your limited reserves of Vim!

Enhanced demon seed management: Demon seeds are now automatically replaced when you acquire a new seed of the same type but greater level, and cleaning all the outdated seeds from your inventory is as quick and easy as pushing a button! Seed descriptions are now more verbose, giving a short explanation of what equipped talents actually do!

Rebalanced and redesigned talents: Every single one of Demonologist's unique trees and talents has been given a revamp to improve midfight utility, reduce tedious prebuffing, streamline awkward mechanics, focus their damage output, and provide more sensible scaling that rewards investment in specific aspects of the class! Poor talents have been buffed, broken talents fixed, and centralisation has been moved away from just a few extremely strong skills to a wide array of potential build options, all while preserving the class's core ethos as a spellslinging melee fighter that refuses to die no matter how much punishment it takes!

Massively redesigned demon seeds: Ring seed effects are much more diverse, and all other seeds have been rebalanced as well, with improved or all-new effects on the vast majority of seeds. Demon seed talents have been given the same balance and design pass as those of the core class, giving enhanced functionality while maintaining the same wild variety of diabolical techniques to respin the class's basic gameplay!

And many more! A (mostly) comprehensive list of changes from basegame can be perused in basegame_changes.txt within the .team file.

Truth has many facets, adventurer. Those who walk in darkness can see the light all the more starkly.

Many in Maj'Eyal have heard of "demons", sadistic creatures who appear seemingly from nowhere, leaving a trail of suffering and destruction whereever they go. Their Fearscape floats far above the skies, watching and waiting, but not idly; their agents scout the land, their legions build up their forces, and their scholars develop new spells and strategies. As the barrier between our worlds begins to crack under their scrutiny, helpless Eyalites have begun to disappear, whisked up to serve as their slaves and playthings. They imbue these victims with magical powers to better survive the ensuing stresses - can you use your new-found abilities to escape the legions of Mal'Rok?

Features:

• Start with a new class, the Doombringer! These avatars of demonic destruction charge into battle with massive two-handed weapons, cutting swaths of firey devastation through hordes of opponents. Armed with flame magic and demonic strength, they delight in fighting against overwhelming odds, softening up the crowd with waves of fire, then feeding on the flames and suffering of their surroundings to stay alive while quickly reducing any group to a pile of ash and gore.
• Unlock a new class, the Demonologist, with an all-new item enhancement mechanic! Bearing a shield and the magic of the Spellblaze itself, these melee-fighting casters can grow demonic seeds from their fallen enemies. Imbue these seeds onto your items to gain a wide array of new talents and passive benefits, and summon the demons within them to fight on your side! Ever looked at a gigantic demon-cursed minotaur and wished it was on your side for once? Well, now you CAN summon one to pound your foes into paste while you cast devastating spells from afar, or call forth a squad of Fire Imps to pelt your enemies to death while they exhaust themselves on your impenetrable defenses! Demons have persistent health, making them a little more precious than disposable necromancer skeletons or summoner beasts, but can be revived from death nonetheless.
• Two new zones, with all-new art, foes, and bosses! You've seen the plains of the Fearscape before, now see the lairs and headquarters of the demons themselves!
• Over 10,000 words of written lore to find! The demons were once an enlightened, peaceful race, hailing from a distant planet known as Mal'Rok; learn what drove them to plot Eyal's eternal torture! Discover monuments to each of the demonic species and noteworthy individuals, showing the place of honor each has among them! Get a glimpse into the culture and daily lives of these sadistic invaders and their brainwashed thralls!
• Unlock a new race, Doomelves: Shalore who've taken to the demonic alterations especially well, corrupting their typical abilities into a darker form. Blink away to safety, transform into a shadowy dúathedlen to hide in the shadows or prey on your foes with blasts of darkness, use your new resilience to soak up status effects and critical hits, and assault your enemies' minds to leave them unsteady in combat!
• Between the aforementioned classes and Doomelves, a whopping 75 new talents!
• Unlock two new cosmetic options! You know you've always wanted demon-horns.
• Two new events, appearing anywhere in Eyal!
• 20 new artifacts, with unique and interesting effects. Collect the Obsidian Treasures to amass more and more power! Slip your hands into the Will of Ul'Gruth and watch your sweeping blows smash down walls! Wear a giant hideous hell-mouth as a fashionable belt!
• 7 new achievements! Conquer the worst Urh'Rok's forces can throw at you, and hang their metaphorical skulls from your profile page!

Revamps the Skirmisher class.

All talents have been re-coded to remove artificial break points in scaling. In most cases, bonuses which were gated by talent level in vanilla will scale in from the first talent point, reaching approximately the same power at the talent level they were previously gated behind.

Many attack talents' damage scaling has been adjusted to bring them more in line with other weapon attack talents. Max damage scaling values remain the same, but talents will scale up to to those values at a rate somewhat closer to other weapon attack talents.

Many attack talents' stamina costs have been reduced to bring them more in line with other weapon attack talents relative to their damage/utility.

Scoundrel is unlocked, master increased to 1.3.
Poisons mastery is increased to 1.3 (from 1.2).
Stealth is granted, locked at 1.0 mastery.

[Buckler Training]
'Buckler Expertise' grants Armor and Hardiness while wearing light armor (values taken from 1.6). The description has also been updated to reflect what it actually does (i.e. it now notes that melee attack deflection does not work in heavy armor).
'Bash and Smash' now scales in the second shield hit as a chance to occur (50-100%). Knockback distance now scales, instead of having an artifical (and hidden) break point.
Moved to level 8 talent.
'Buckler Mastery' no longer has scaling projectile spread radius (projectiles will always be deflected in a radius of 1). Buckler Mastery now grants immunity to damage from your own projectiles. The critical strike for Bash and Smash now scales in as increased crit chance (50-100%) for the shield hit(s).
Moved to level 12 talent.
'Counter Shot' has been replaced with a new level 4 talent:
'Dash and Crash', a talent which will rush toward a targeted foe up to X tiles away, attack with your shield for Y damage, and activate Block for free. If the shield strike hits, the target may be confused for Z turns. Cooldown decreases with level [~20-10 turns].

[Tireless Combatant]
'Tireless Combatant' talents have been changed to use Dexterity (instead of Willpower) as a requirement.
'Breathing Room' now adds stacks of the new 'Breathing Room' effect each turn their are no enemies adjacent to you. The effect increases life and stamina regen and can stack up to 4 times. You will lose one stack per turn if an enemy is adjacent to you.
'Pace Yourself' now grants flat damage armor instead of reduced fatigue.
'Dauntless Challenger' has been reworked. Rather than passively granting regeneration, you can activate the talent to consume all stacks of Breathing Room and gain the Dauntless Challenger effect for X turns. The effect grants 200% of the stamina regen and 400% of the life regen granted by Breathing Room, multiplied by the number of stacks consumed. You cannot gain stacks of Breathing Room while under this effect, but the regeneration from Dauntless Challenger will persist regardless of enemy location, etc.
'The Eternal Warrior' has improved resistance cap scaling, and now scales in the 'Breathing Room' regeneration bonus from 10%-20% (which also improves 'Dauntless Challenger' as a result).

[Skirmisher Slings]
'Sling Supremacy'now allows you to reload when you Block.
'Swift Shot' now resets Hurricane Shot cooldown completely. Additionally, a somewhat obscure but potentially exploitable bug from vanilla has been removed.
'Hurricane Shot' now always hits targets only once, but the damage scaling is doubled. Projectiles from this attack now travel instantly.
'Bombardment' has been completely reworked. It now costs 20 stamina to sustain, causes Shoot to cost 5 stamina, and increases fatigue by 50%. While active, all sling shots which hit will trigger an instant sling attack on the same target for [20-40]% weapon damage. This can trigger from any shot, from any talent, so long as a sling is equipped. This can affect multiple targets and trigger multiple times, but will strike each individual target twice per turn at most.

[Called Shots]
'Called Shots' attack talent projectiles now travel instantly.
'Kneecapper' has improved pin and slow duration scaling.
'Noggin Knocker' now scales up the stun/increase duration, from 1 (at TL 1) to 2 (at ~ TL 5 / TL 4 at 1.3 mastery).
'Sling Sniper' cooldown reduction now scales and it is possible to reach 3 turn reduction with increased mastery.

A new demented class, the Martyr.

This addon requires the Forbidden Cults DLC to function.

Unlike the magical folk of the Hidden Sanctuary, Martyrs' Insanity manifests in mental powers.
Martyrs mix together Sling and Melee combat, needing to use both (correctly timed with their current insanity) to succeed.
With time, they developed much stranger powers.

New Talents:
Demented / Chivalry: A special half-tree, focusing on your melee attacks
Demented / Vagabond: A special half-tree, focusing on the use of a sling
Demented / Whispers: The core tree, adjusting your stats as your insanity waxes and wanes and guiding you around the battlefield
Demented / Unsettling Words: Confuse and weaken your enemies
Demented / Scourge: Crippling, tormenting melee attacks
Demented / Standard-bearer: Control the battlefield with your glorious flags!

Advanced Talents:
Demented / Final Moment: Make use of a very special sword
Demented / Revelation: Horrors are all around you, and you're the only one who's prepared
Psionic / Crucible: Direct mental attacks. The more damage you take, the more damage you do!

Old Talents:
Cunning / Survival
Psionic / Feedback

Korean Translation by khelerd https://te4.org/games/addons/tome/kotr-martyr is included

One year has passed since the one the Orcs call the "Scourge from the West" came and single-handedly crushed the Orc Prides of Grushnak, Vor, Gorbat, and Rak'Shor.  The Allied Kingdoms, now linked by farportal to their distant, long-lost Sunwall allies, have helped them conquer most of Var'Eyal.  The few remnants of the ravaged Prides are caged...  but one Pride remains.  Kruk Pride, isolated on an island, is the last orcish settlement that stands; they, too, face their impending doom.  The Sunwall has blockaded the only exit point from the island, and now, the technologically advanced civilization of Steam Giants have come down from the mountains to take their homeland with machines and weaponry unlike anything else on Eyal.  Kruk Pride has reverse-engineered their technology before; their only hope is to do it again and rise up against the Pride's foes.
 

Features:

• Explore a whole new campaign from level 1 to 50, one year after the events of the original Tales of Maj'Eyal campaign. Liberate the Orcs (or die trying) by rising up against the Sunwall, the Steam Giants of Atmos, and other dangers that may lie in wait...
• Play as one of three new races: the battle-hardened Orcs, the brutal Yetis, and the unstoppable Whitehooves. Discover their stories, their pains, their hopes... and their awesome racial powers!
• Risk your life in over 20 unique zones! Explore the ruins of a lost city, lay siege to the Sunwall forces at the Gates of Morning, and raid the Steam Giants' mining quarry - each has its own unique foes and hazards, leading each to feel and play different from the others.
• Play as one of the four new tinker classes: Gunslingers, Sawbutchers, Psyshots and Annihilators! Plus a class evolution: Technomancers! Crush and rend your foes with heavy metal, electrocute and immolate them with your gadgets, charge across the battlefield or nimbly strafe in style - each plays differently, and none provide any shortage of ways to slay your foes.
• Master steam technology to build powerful tinkers to augment your equipment. Need to close in a bit quicker? Turn your boots into rocket boots! Having a hard time deciding whether to shoot someone or stab them? Build a Hand Cannon into your gloves, or deploy a Weapon Automaton to do the stabbing for you! If you have a problem, steamtech has a solution, usually involving explosions; with over 80 different powerful contraptions to craft, enjoy unparalleled versatility and trying something different with every playthrough.
• Master the tactical uses of over 140 talents! Fire bouncing trick-shots and psychic-infused shots, use your steamsaws as shields or wheels, terrify your foes with long mechanical arms - there are no "boring" talents here, everything has its own special applications and properties!
• Use advanced technology in the world of Eyal! Burrow through sand, plant bombs to destroy tunnels, and discover that you aren't alone in using it...
• Infusions and runes are for puny humans; implant new medical injectors to pump an array of experimental chemicals into your body! Injectors can use any (infinitely reusable) salve in your inventory as long as they're off their cooldown, giving you versatility you've wished you could get with a couple of inscriptions.
• Loot over 70 new and powerful artifacts. Pump lead into foes with big guns, quick guns, and explosive guns! Shred them with saws that maim, saws that thirst for blood, and saws that aren't really saws! Violate common sense by strapping a rocket to your back and calling it a jetpack!
• Enjoy dying in horrible and exotic ways at the hands (or claws, jaws, guns...) of over 140 new creatures! Not mere piles of stats and chain-stuns, these foes will provide unique challenges - suffer the Sunwall's newest cosmic spells, the new breeds of ritches that infest and multiply, the Steam Giants' elaborate defense systems, and find new strategies to adapt to each!
• Earn a trunkload of achievements! Have your accomplishments recognized for liberating the Orcish people, displaying exceptional mercy or cruelty, or showing your prowess with impressive feats! Give a boss a fate worse than death, show Sunwall forces how frustrating it is to fight a Radiant Horror as a paladin, come out on top against impossible odds, display a suicidal lack of situational awareness, and wear a badge of pride or shame for each!
• Read roughly 27,000 words of new lore to immerse yourself in the world! Learn how things have changed since the Scourge's campaign, feel hatred and/or pity for your foes, uncover grand schemes and sinister plots, and notice the elaborate connections between Var'Eyal's numerous factions. Every zone has a story behind it, and every story ties into a bigger picture; enjoy a tale of horror and humor, of intrigue and glory, of despair and hope.
• Earn the right to use the classic (and Ashes of Urh'Rok) classes in Embers of Rage, and the new tinker classes in Maj'Eyal! Play a Brawler in the East to fulfill your life-long dream of suplexing an entire nation of giants, or play a Sawbutcher in Maj'Eyal to shred through Dreadfell in a whirlwind of sawblades and steam!

Not all adventurers seek fortune, not all that defend the world have good deeds in mind.
Lately the number of sightings of horrors have grown tremendously. People wander off the beaten paths only to be found years later, horribly mutated and partly insane, if they are found at all. It is becoming evident something is stirring deep below Maj'Eyal.
That something is you.

Forbidden Cults is a big expansion for Tales of Maj'Eyal to let you explore the horrors that lurk beneath the surface, to delve in long lost knowledge and lore and as usual to die a lot!

Forbidden Cults makes two new classes available to play:

• Writhing One: Give in to the corrupting forces and turn yourself gradually into an horror, summon horrors to do your bidding, shed your skin and melt your face to assault your foes. With your arm already turned into a tentacle, what creature can stop you?
• Cultist of Entropy: Using its insanity and control of entropic forces to unravel the normal laws of physic this caster class can turn healing into attacks and call upon the forces of the void to reduce its foes to dust.

Both those classes use a new resource called Insanity that gradually makes you both more chaotic and powerful as it fills up.

Forbidden Cults makes two new races available to play:

• Drem: A corrupt subrace of dwarves, that somehow managed to keep a shred of sanity to not fully devolve into mindless horrors. They can enter a frenzy and even learn to summon horrors.
• Krog: Ogres transformed by the very thing that should kill them. Their powerful attacks can stun their foes and they are so strong they can dual wield any one handed weapons.

Forbidden Cults adds many new zones for you to explore and die in:

• Kroshkkur: An ancient Sher'tul Fortress laying half in ruins that serves as a focal point, and home, for all kinds of creatures seeking lost knowledge.
• The Maggot: A huge living corrupted worm about to destroy Kroshkkur! Teleport inside and save your sanctuary of horrors!
• The Godfeaster: Deep undergroud the ground shakes as ... -- redacted by corrupt forces --
• The Scourge Pits: On the south of the Iron Throne lays a fool pit of ... -- redacted by corrupt forces --
• Forbidden Tomes: Find special artifact books of ancient lore. But, read at your own peril, for the story they tell may very well suck you in... quite literally.
  Maybe you will even find The One That Writes...
• Occult Egress: A strange, extremely old, contraption of unknown origin. It seems to require some kind of code sequence to activate. Maybe you will find some during your adventures?
• The Entropic Void: So you think you are strong? Powerful? Invulnerable? In the end, entropy always wins, as you will learn...

What would an expansion about horrors be without a bunch of new horrors to torment you with? Please give a warm welcome to:

• Searing Horrors: You liked luminous horrors? You loved radiant horrors? You will absolutely adore their searing big brothers!
• Nethergates: It sleeps. Maybe it should stay that way.
• Netherworms: Vampiric worm masses that are bound to tickle your fancy! And tickle hard.
• Fearful Symmetry: Geometry has never been so lively!
• Entropic Shards: Take an entropic crystal, shatter it with tentacles. And die.
• : And more ...

"DarkGod, is that all?" Obviously not! You will also find your usual addition of:

• Lore: Delve into the dark forgotten secrets of the world, where sanity is a very tenuous idea.
• Artifacts: Discover new objects of power and use them to further your own goals.
• New wyrmic tree: Unlock the scourge drake for your wyrmics.
• Glass Golem: Unlock the glass golem option for your alchemists.
• Events: Discover new strange contraptions in familiar zones. What could go wrong?
• Achievements: Because there can never be enough!