A part of the Eclipse talent tree.
Corona: sustained, 10 positive, 10 negative, 10 range, 300% velocity, -2 positive or negative energy per bolt shot. Every time one of your spells is critical, you shoot a light or darkness bolt (50% each) at up to (talent, rounded down) enemies, dealing (0.30 * [15 + spellpower] * talent modifier) rescaled light or darkness damage.
Fires a cheap bolt of light or darkness every time you gain a critical hit with one of your spells while active.