I assume you mean one that would actually make sense in a game, not an ultimate do-everything-at-once spell.

Tortured Past: Only learned by a character with, well, a tourted past. Does 1/2 of the characters maximum HP, depending on the level. so if the max HP of the character is 5000, it does 2500. Cinema includes tortured spirits screaming as they come from the ground and attack your foe.