Hero crosses his arms and emitting a golden glow around him, becoming intangible for a few seconds. Afterwards, following a dramatic slowdown, Hero explodes, instantly KO'ing himself and dealing massive damage and knockback to all nearby opponents, which is unblockable, making the move, as its namesake, an effective sacrificial option, though due to Hero being KO'd first, Kamikazee is an ineffective option when Hero does not possess a stock lead over the opponent.
Kamikazee's name is a clue to the spell's effect. As its name (which is a pun on Kamikaze) implies, it involves destroying all enemies at the cost of the caster's life (hence the Hero's chance to immediately die). It first appeared in Dragon Quest II, and is often cast by NPC characters and enemies.