Mutation Effect

The Mutation Effect, also known as the Curse of the King (王の呪い, Ō no noroi), is an phenomenon in Highschool DxD: Jester of the Gremory Clan.

Summary
First introduced in Volume 7, the Mutation Effect was named by the neo-satan Keymau Asmodeus and later explained by Ajuka Beelzeroth. It is an mysterious phenomenon that can happen at random, when a devil, pure of reincarnated, first gets his/her Evil Pieces.

TBA.

Known Mutated Kings

 * Uther Pendragon (Reincarnated devil)
 * Shi Gremory
 * Clyde Amaymon
 * Jackson Naberius
 * Gasper Vladi (Reincarnated devil)
 * Angeroa Vassago
 * Vulcan Rubicante
 * Keymau Asmodeus

Trivia

 * Shi is the only known female devil to be a Mutated King.