It gained a unique affix in 2.2. 0 that summons Fallen Lunatics, to a limit of 4 at a time (8 in early PTR builds). Each of them explodes for roughly 10000% damage in 15-20 yards, choosing the highest Elemental Damage skill bonus the character has. They follow the character as pets.

What counts as a pet in Diablo 3?

Pet is a common name for any summonable companion of a player. Pets autonomously and independently attack enemies (or otherwise assist in battle) while not being under the player's direct control. In fact, most pets act as monsters, except for they are fighting on player's side.

What is a fallen lunatic?

A Fallen Lunatic The Lunatics are large, bloated Fallen creatures. The most unstable of their kind, this leads them to produce highly combustible fluids in their abdomens, one that Abd al-Hazir believed was inherently fatal to the Lunatics.