A powerful curse for Death's most hated foe, Unholy Song is among the strongest curses in the game, yet is cheap enough (as a mere Advanced spell) to be used every time you encounter Life creatures. This spell affects Life heroes (the Knight and Priest) as well. Be advised that Life's level three creatures (the Monk and Crusader) have a 50% chance of resisting this spell, as do any Death Warded opponents. Also, a single Mass Exorcism will undo the spell entirely, though at a greater cost than spent in casting it.