Plague Bomber

Plague Bomber (プレイグ・ボンバー) is a walking corpse that is literally a bomb.

Appearance
Compared to normal zombies, this undead has an unusually bloated, circular body.

Abilities
The reason for its bloated state is because it is filled with negative energy. This is an undead which explodes upon death to inflict negative damage to the living and heal any nearby undead around it. It will closely approach their foes before they decide to detonate themselves.

Trivia

 * The Plague Bomber was first introduced in the Web Novel.