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This page describes game content that will be reworked in a future update.
Infernus Skull
Infernus Skull
Infernus Skull.png
EnvironmentThe Underworld
AI TypeInfernus Skull AI
Damage50 / 100
Max Life5500 / 11000
KB Resist100%
Inflicts debuffOn Fire!.pngOn Fire!
Debuff duration5 seconds / 10 seconds
Debuff tooltipSlowly losing life
Immune toOn Fire!.pngCursed Inferno.pngConfused.png

"You have yet to defeat the true master of Hell..."

The Infernus Skull is a floating skull spawned by Infernon. It teleports around and shoots blasts of fire in the 8 cardinal directions. In normal mode, it is summoned when Infernon reaches half health. In expert mode, it is summoned at the start of the fight; and appears as a final phase of the boss fight.


with Infernon[]

It will shoot 8 infernal waves in the cardinal directions, afterwards its teleports to another spot and repeats the attack again.

without Infernon[]

Once Infernon is defeated, its behavior will change. Stops teleporting, and use these attacks in the following order:

  1. Shooting 8 infernal waves in the cardinal directions.
  2. Shooting Short-Lived homing blasts. It does not perform this attack when under 1/3rd of its life
  3. Spawning 4 fireballs in a + shape around itself. those fire balls explode into 4 smaller fireballs in a + shape. If it has lost 2/3rds of its life, it may summon 4 additional fireballs further away


  • There is two different versions of the Infernus Skull. Each one has a different behavior.


  • 1.4.2: Resprited.
  • 1.3.1: Changed to also be the final phase of an expert Infernon battle.
  • Introduced.
Characters: Wrathful Soul.png Pre-Hardmode Enemies • Ancient Tome.png Hardmode Enemies • Bloomshroom.png Event Enemies • Scarabeus (Map icon).png Bosses
Blossmoon.png Critters • Gambler.png Friendly NPCs