Mutanus the Devourer

Mutanus the Devourer is a level 20 elite murloc boss found in the Wailing Caverns.

Summary
Mutanus is the final boss in Wailing Caverns. You must return to the entrance to summon him. He'll appear during the Naralex event after 2 waves of smaller mobs. He hits quite hard, and if he catches you off-guard, he could potentially wipe out your group. Make sure you eat and drink before he spawns. Mutanus has a powerful sleep spell called Delusions of Naralex which he will sometimes cast during the fight. Only enter at full health.

Lore
Mutanus appears to disrupt any attempt by the Disciple of Naralex to wake the sleeping Naralex. Manifested from Naralex's Nightmare, Mutanus the Devourer has been ordered by whatever force has infected Naralex's dreams to prevent anyone from awakening him. Mutanus appears as a colossal albino Murloc.

Adventure Guide
''From the darkest corners of Naralex's twisted mind, the corruption plaguing the Emerald Dream has manifested in the form of the druid's worst enemy: murlocs. The aberration known as Mutanus has come to the waking world to devour any who seek to liberate Naralex from the Nightmare's clutches.''

Wrath of the Lich King
Mutanus is a "memory" in the fight against Argent Confessor Paletress in the Trial of the Champion encounter of the Crusaders' Coliseum.

Abilities


He is also immune to Shadow spells.

Related achievements

 * Wailing Caverns (achievement)
 * Wailing Caverns Guild Run

In Hearthstone
Mutanus appears as a legendary minion in the Wailing Caverns mini-set for Hearthstone. Its flavor text reads: "As long as Naralex stays under the blanket, Mutanus can't get him."