Everlasting black flame.

Everlasting black flame is a move that casts black flames on the target, that do continuous damage until dispelled or the target's death. Using this move makes the user 5% blind, so this can only be used 20 times in total. You need to roll a 15 on Intell saving. After this move kills someone it spreads to nearby enemies in a 5ft radius, and that radius multiplies after it kills more targets.