Death Spell (Japanese: ), abbreviated DthSpell, is a skill used by Seth in Phantasy Star IV: The End of the Millennium. It defeats a single enemy instantly, if successful. Seth's mental stat, the enemy's mental stat, and the enemy's bio sensitivity affect death spell's success rate. Enemies immune to bio effects, particularly Machines, Zombies, Dimensional Demons, Ghosts, and most bosses, are immune to Death Spell.
Seth already knows Death Spell when he joins the party.