Zone Artifacts: Artifacts that can never be found outside of a specific zone.

Found in Abashed Expanse(Archmage starting dungeon). I believe an exact copy of this also appears in the Unhallowed Morass(Temporal Warden/Paradox Mage) starting dungeon, but I have not tested this.

Artifact Name: Void Star

Base equipment type: Lite
Powered by: Arcane Forces
Level Range: 1, 10
Weight: 1,
Rarity: False
Description: It looks like a very tiny star - deep black - and yet it somehow shines.
Cost: 120,
Material Rank: 2,
Bonuses upon equipping:

 Spell Critical Hit Rate: + 5,
 Raises Damage%:
 Arcane: +6,
 Fire: +6,
 Cold: +6,
 Acid: +6,
 Lightning: +6,
 Light Radius: 2,

Maximum stored ability power: 70,
Usable Talent: Echoes From The Void. Level = 2, Consumed power: 70

Found in the Ancient Elven Ruins:

Artifact Name: Bindings of Eternal Night

Base equipment type: Mummy Wrapping. Is part of a set.
Powered by: Arcane Forces
Description: Woven through with fel magics of undeath, these bindings suck the light and life out of everything they touch. Any who don them will find themselves suspended in a nightmarish limbo between life and death.
Level Range: 1, 50
Rarity: 20,
Cost: 200,
Material Rank: 3,
Bonuses upon equipping:

 Armor: +7,
 Increases Stats: Willpower: +5, Magic: +5,
 Elemental Resistance%:
 Blight: +30,
 Darkness: +30,
 Light: -20,
 Fire: -20,
 Added Damage/Status on-hit damage:Blight: +10
 Life Regeneration Per Turn: +0.3,
 Light Radius: -1,
 Poison Immunity: 1,
 Disease Resistance: +1,
 The wearer is treated as undead, and cannot use Infusions.

Maximum stored ability power: 80, no default skill.

Set with: Crown of Eternal Night.
Set Bonus: Usable talent becomes Abyssal Shroud(L2, 47 Consumed Power.).

Artifact Name: Crown of Eternal Night

Base equipment type: Leather Cap. Part of a set.
Powered by: Arcane Forces
Description: This crown looks useless, yet you can feel it woven with fell magics of undeath. Maybe it has a use.
Level Range: 1, 50
Cost: 100,
Rarity: 20,
Material Rank: 3,
Bonuses upon equipping:

 Armor: +3,
 Fatigue: +3,

Maximum stored ability power: 80, no base ability.

Set with: Bindings of Eternal Night.
Set Bonus:
Light Radius -1
Confusion Resistance: 0.3.
Knockback Resistance: 0.3.
Mind Save: +15.
Spell Save: +15.
Cunning: +10
Added Damage/Status on-hit damage: +40 Darkness.
Increases Damage%: +20 Darkness.
Usable Talent becomes Retch(Level 2, 47 Consumed Power).

Found in Ardhungol(the spider dungeon in the Far East):

Artifact Name: Rod of Spydric Poison

Base equipment type: Rod
Powered by: Nature
Description: This rod carved out of a giant spider fang continuously drips venom.
Cost: 50,
Electricity Proof(obsolete flag?): True.
Maximum stored ability power: 75,
Usable power: "shoot a bolt of spydric poison". Consumed power: 25,

Found in the Blighted Ruins(Undead starting dungeon):

Artifact Name: Cloak of Deception

Base equipment type: Cloak
Powered by: Arcane Forces
Weight: 1,
Description: A black cloak, with subtle illusion enchantments woven in its very fabric.

Bonuses upon equipping:

 Spellpower: + 5,
 Mindpower: +5,
 Physical Power: +5,

 Special: Required to have equipped to not have all friendly non-summoned NPCs not turn on a Skeleton or Ghoul.
 Can be upgraded to use this effect whenever carried, rather than equipped, at the Fortress.

Found in the Crypt of Kryl-Feijan(The randomly appearing event crypt):

Artifact Name: Writhing Essence of Nightmares

Base equipment type: Mindstar
Powered by: Psionic Forces.
Description: Whispers seem to ceaselessly emanate from this writhing mass of black tentacles, murmuring unspeakable horrors into the ears of any unfortunate enough to hear them.
Level Range: 20, 32
Rarity: 30,
Cost: 120,
Required Statistic(s): Wil: 30
Material Rank: 3,
Combat Statistics:

 Base Weapon Damage: 15,
 Armor Penetration: 20,
 Physical Critical Hit Rate Bonus: +2,
 Damage Modifier: Wil: 0.5, Cun:0.3
 Damage Element=Darkness,

Bonuses upon equipping:

 Mindpower: +15,
 Mental Critical Hit Rate: + 3,
 Elemental Damage%: 
 Mind: +10,
 Darkness: +10,
 Category Rank Bonus(es):
 "cursed/fears" = 0.2,
 "psionic/nightmare" = 0.2,
 Increases Stats: Willpower: +4, Cunning: +2,

Maximum stored ability power: 40,
Usable Talent: Waking Nightmare. Level = 2, Consumed power: 40

Found in the Fearscape(special version you need to be sent to with the Demonic Orb of Many Ways):

Artifact Name: Shifting Boots

Base equipment type: Leather Boot
Powered by: Arcane Forces
Description: Those leather boots can make anybody as annoying as their former possessor, Draebor.
Rarity: False
Cost: 200,
Material Rank: 5,
Bonuses upon equipping:

 Armor: +1,
 Defense: +7,
 Fatigue: +2,
 Category Rank Bonus(es): "spell/temporal" = 0.1
 Increases Stats: Cunning: +8, Dexterity: +4,

Maximum stored ability power: 40,
Usable power: "blink to a nearby random location" Consumed power: 22,

Found in Sandworm's Lair:

Artifact Name: Atamathon's Ruby Eye

Base equipment type: Gem
Description: One of the ruby eyes of the legendary giant golem: Atamathon.
It is said it was made by the halflings during the Age of Pyre as a weapon against the orcs. Even though it was destroyed it managed to deal a crippling blow by killing their leader, Garkul the Devourer.
Material Rank: 5,
Cost: 100,
Bonuses upon equipping:

 Raises Damage%: Fire: +12

When Imbued into an item:

 Raises Damage%: Fire: +12

Found in the Golem Graveyard, upon defeating Atamathon(!). Note: Not the same as the Sandworm Lair item!

Artifact Name: Atamathon's Ruby Eye

Base equipment type: Gem
Description: One of the ruby eyes of the legendary giant golem: Atamathon.
It is said it was made by the halflings during the Age of Pyre as a weapon against the orcs. Even though it was destroyed it managed to deal a crippling blow by killing their leader, Garkul the Devourer.
Material Rank: 5,
Cost: 100,
Bonuses upon equipping:

 Raises Damage%: Fire: +20
 Added Damage/Status on-hit damage: Fire: +100
 Light Radius: +2,
 Maximum Life Bonus: +60,
 Pinning Resistance: +0.5,

When Imbued into an item:

 Raises Damage%: Fire: +20
 Added Damage/Status on-hit damage:Fire: +100
 Light Radius: +2,
 Maximum Life Bonus: +60,
 Pinning Resistance: +0.5,

Found in the Halfing Ruins:

Artifact Name: Yeek-fur Robe

Base equipment type: Cloth Armor
Powered by: Psionic Forces
Description: A beautifully soft robe of fine white fur. It looks designed for a halfling noble, with glorious sapphires sewn across the hems. But entrancing as it is you can't help but feel a little queasy wearing it.
Level Range: 12, 22
Rarity: 20,
Cost: 250,
Material Rank: 2,
Bonuses upon equipping:

 Defense: +9,
 Armor: +3,
 Mindpower: +5,
 Mental Save: +10,
 Raises Damage%: Mind: +5
 Elemental Resistances: Cold: +20

Special: When worn by a Yeek, gains the following penalties:
-15 Mind Power

+ 25 Mind Save

Special: When worn by a Halfling, gains the following bonuses:

+ 15% Mind Damage

+10 Mind Save

Found in High Peak. These are possessed by the final bosses:

Artifact Name: Awakened Staff of Absorption

Base equipment type: Staff
Powered by: Unknown Forces
Is classed as a Godslayer(No current effects?)
Weight: 7,
Description: Carved with runes of power, this staff seems to have been made long ago. Yet it bears no signs of tarnishment.
Light around it seems to dim and you can feel its tremendous power simply by touching it.
The Sorcerers seem to have awakened its power.
"And lo they came to Amakthel himself, and thousands were killed in the assault on his throne, and three of the Godslayers were broken beneath his feet. But Falion with his dying breath pierced the great god on his knee with the icy sword Arkil, and seeing his opportunity Caldizar, leader of the Godslayers, advanced with the Staff of Absorption and struck a terrifying blow against Amakthel. So fell the greatest of the gods by the hands of his own children, and his face was forced into the dust."

Required Statistic(s): Mag: 60
Combat Statistics:

 Base Weapon Damage: 60,
 Armor Penetration: 60,
 Accuracy: + 30,
 Damage Modifier: Mag: 1.3
 Damage Element: Arcane,
 Is a Greater Staff(Can strengthen all elements of its Staff[Vile, etc.] type instead of one.)
 Is a Breaching Staff(?)

Bonuses upon equipping:

 Spellpower: + 48,
 Spell Critical Hit Rate: +15,
 Maximum Mana: +100,
 Maximum Positive Energy: +50,
 Maximum Negative Energy: +50,
 Increases Stats: Magic: +10, Willpower: +10
 Raises Damage%:
 Fire: +60,
 Lightning: +60,
 Cold: +60,
 Arcane: +60,

 Elemental Resistance Penetration%:
 Fire: +30,
 Lightning: +30,
 Cold: +30,
 Arcane: +30,
 

Grants Talent while equipped: Command Staff = 1,

Maximum stored ability power: 200,
Usable power: "absorb energies" Consumed power: 200,

Special: Grants you the ability to understand the Sher'tul language while equipped.

Artifact Name: Pearl of Life and Death

Base equipment type: Gem
Powered by: Nature
Weight: 2,
Description: A pearl, three times a normal sized one, that glitters in infinite colours, with slight patterns ever shifting away.
While Carried(Does not need to be equipped for this bonus):

 Light Radius: 1,
 Increases Stats: Strength: +5, Dexterity: +5, Magic: +5, Willpower: +5, Cunning: +5, Constitution: +5, Luck: +10
 Raises Damage%: All: +7
 Elemental Resistance%: All: +7
 Stun Resistance: +1,

Found in the Keepsake Meadow. You only get one of these two, depending on your actions there.

Artifact Name: Iron Acorn

Rarity: False
Powered by: Psionic Forces
Cost: 1,
Material Rank: 1,
Weight: 0,
Not Found In Stores: True
Description: A small acorn, crafted crudely out of iron. It once belonged to Bander, but now it is yours. You find having the acorn helps to anchor your mind and prepare you for the trials ahead.
While Carried(Does not need to be equipped for this bonus):

 Elemental Resistances: Mind: +30, Physical: +8,
 Mindpower: +15,
 Maximum Life Bonus: +40

Special: Can never be dropped.

Artifact Name: Cold Iron Acorn

Rarity: False
Powered by: Psionic Forces
Cost: 1,
Material Rank: 1,
Weight: 0,
Not Found In Stores: True
Description: A small acorn, crafted crudely out of iron. It once belonged to Bander, but now it is yours. The acorn serves as a reminder of who and what you are.
While Carried(Does not need to be equipped for this bonus):

 Elemental Resistances: Mind: +30,
 Raises Damage%: Physical: +12
 Movement Speed Bonus: +0.2

Special: Can never be dropped.

Found by competing and winning in the Ring of Blood tournament:

Artifact Name: Bloodcaller

Base equipment type: Ring
Powered by: Psionic Forces
define as = "Ring OF BLOOD
Description: You won the Ring of Blood trial, this is your reward.
unided Artifact Name: bloody ring
Rarity: False
Cost: 300,
Material Rank: 4,
Bonuses upon equipping:

 Mental Save: -7,
 Fatigue: -5,
 Chance to leech life with any attack%: 15,
 %Amount of the attack's damage that is restored in healing when the Life Leech: 30,

Note: There is a "life = 35" flag on this equip, however, it is unknown what, if anything, this does, and the equip's description shows no listed effect from it. It isn't maximum life...

Found in the Slazish Fen(Sun Paladin/Anorithil eastern start dungeon though I believe the boss you have to fight for them technically isn't there...

Artifact Name: Robes of Deflection

Base equipment type: Cloth Armor
Powered by: Arcane Forces
Description: This set of robes seems to shine with metallic colors.
Level Range: 1, 10
Rarity: False
Cost: 70,
Material Rank: 1,
Bonuses upon equipping:

 Armor Hardiness: +30,
 Armor: +7,
 Increases Stats: Constitution: +3, Magic: +3,
 Spellpower: + 4,

Randomly used talent on spell hit(Once per turn at most): Chance%:4, Talent: Evasion. Talent Level: L1

Found in Telmur:

Artifact Name: Telos's Staff (Bottom Half)

Base equipment type: Staff
Powered by: Arcane Forces
Can be used one-handed, and defaults to the offhand slot.
Description: The bottom part of Telos's broken staff.
Required Statistic(s): Mag: 35
Weight: 2.5,
Cost: 500,
Bonuses upon equipping:

 Increases Stats: Magic: +4,
 Maximum Mana: +50,
 Mental Save: +8,
 Raises Damage%:
 Cold: +20,
 Acid: +20,

Found in the Temple of Creation. The latter requires a specific Prodigy to be obtained.

Artifact Name: Eldritch Pearl

Base equipment type: Lite
Powered by: Arcane Forces
Description: Thousands of years spent inside the temple of creation have infused this pearl with the fury of rushing water. It pulses light.
Cost: None, cannot be sold or purchased.
Bonuses upon equipping:

 Light Radius: 6,
 Allows the wielder to breathe in water normally.
 Physical Power: +12,
 Spellpower: + 12,
 Increases Stats: 
 Strength: +4,
 Dexterity: +4,
 Magic: +4,
 Willpower: +4,
 Cunning: +4,
 Constitution: +4,
 Luck: -5,

Maximum stored ability power: 150,
Usable Talent: Tidal Wave. Talent Level: L4, Consumed power: 80

Artifact Name: Legacy of the Naloren

Base equipment type: Trident
Powered by: Nature, Psionic Forces
Description: This incredibly beautiful-and powerful-trident is made of the rare metal orichalcum. An amazing pearl is seated in head of the trident, as it spreads into three razor sharp prongs.
It is imbued with the greatest strengths of all of the most powerful Naga warriors.
Slasul gave it to you as a sign of his faith in you. It is a sign of hope for all of the Naloren race, that one outside of their tribe could be so trusted.
Required Statistic(s): Str: 35
Level Range: 40, 50
Rarity: False
Cost: 350,
Material Rank: 5,
Combat Statistics:

 Base Weapon Damage: 84,
 Armor Penetration: 20,
 Physical Critical Hit Rate Bonus: +20,
 Damage Modifier: = Str: 1.4
 Randomized Physical Damage Range: 1.4,
 Random Talent on melee hits: 
 Stunning Blow. Talent Level: L1, Chance%:10
 Silence. Talent Level: L3, Chance%:10
 Spit Poison. Talent Level: L5, Chance%:10

Bonuses upon equipping:

 Light Radius: 2,
 Physical Power: +12,
 Mindpower: +12,
 Mental Critical Hit Rate: +12,
 Increases Stats: 
 Strength: +4,
 Dexterity: +4,
 Magic: +4,
 Willpower: +4,
 Cunning: +4,
 Constitution: +4,
 Luck: +10,
 Elemental Resistance%:
 Cold: +15,
 Nature: +20,
 Acid: +10,
 Raises Damage%:
 Cold: +15,
 Nature: +25,
 Mind: +10,
 Talent Cooldown Reduction(s):
 Rush =3,
 Spit Poison =2,
 Category Rank Bonus(es):
 "technique/combat-training" = 0.3,
 "technique/combat-techniques-active" = 0.3,
 "psionic/psychic-assault" = 0.3,

Maximum stored ability power: 60,
Usable Talent: Implode, Talent Level: L2, Consumed power: 40

Randomly appear in Vor Armory, and only there:

Artifact Name: Tome of Wildfire

Base item type: Scroll
Powered by: Arcane Forces
Description: This huge book is covered in searing flames. Yet they do not harm you.
Level Range: 35, 45
Rarity: 200,
Cost: 100,

Special: When used, is consumed and has one of two effects.

If the user has none of the Flame Talent, grants L3 Flame Talent, permanently.

If the user has the Flame Talent, grants +0.1 to the Fire and Wildfire talent categories. (I believe this doesn't unlock Wildfire for the user if they don't have it already.)

Artifact Name: Tome of Uttercold

Base equipment type: Scroll
Powered by: Arcane Forces
Description: This huge book is covered in slowly shifting patterns of ice. Yet they do not harm you.
Level Range: 35, 45
Rarity: 200,
Cost: 100,

Special: When used, is consumed and has one of two effects.

If the user has none of the Ice Storm Talent, grants L3 Ice Storm, permanently.

If the user has the Ice Storm Talent, grants +0.1 to the Water and Ice talent categories. (I believe this doesn't unlock Water or Ice for the user if they don't have it already. Also, it's rather hard to have the Ice Storm talent now...)

In Dreadfell, dropped by The Master:

Artifact Name: Staff of Absorption

Base equipment type: Staff
Powered by: Unknown Forces
Level Range: 30, 30
Weight: 7,
Will be automatically picked up, and is an undroppable plot item.
Description: Carved with runes of power, this staff seems to have been made long ago. Yet it bears no signs of tarnishment.
Light around it seems to dim and you can feel its tremendous power simply by touching it.
Required Statistic(s): Mag: 60
Combat Statistics:

 Base Weapon Damage: 30,
 Armor Penetration: 4,
 Damage Modifier: Mag: 1
 Damage Element: Arcane,

Bonuses upon equipping:

 Accuracy: + 20,
 Spellpower: + 20,
 Spell Critical Hit Rate: + 10,

Maximum stored ability power: 1000,
Usable power: "absorb energies" Consumed power: 1000,

Special: The used ability does nothing but give a special message.