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Map icon
EnvironmentThe Underworld
Damage36 / 72 / 108
Max Life13,000 / 26,000 / 33,150
KB Resist100%
Inflicts DebuffOn Fire!.pngOn Fire!
?% chance chance

Debuff tooltipSlowly losing life
Immune toOn Fire!.pngCursed Inferno.pngShadowflame.pngConfused.png
This diabolical demon was once shackled in the depths of the underworld, but has finally broken free. Any mortal who would dare obstruct his rampage should prepare for one hell of a fight.

Infernon Trophy.png "You have yet to defeat the true master of hell.." Infernon Trophy.png

Infernon is an early Hardmode boss that is fought in The Underworld. He is intended to be fought after the Wall of Flesh or the Mechanical Bosses.

While Infernon is alive, his exclusive music will play.


Infernon does not spawn on its own and requires the player to summon him with the Pain Caller in the Underworld.


Infernon flies above the player, occasionally swooping down at them and firing various projectiles while occasionally summoning Infernon Skulls. Infernon will also spawn the Infernus Skull, which fights alongside him as an invincible ally, and in Expert Mode, it also functions as the final phase of the boss fight.

When Infernon is killed in Normal Mode, he leaves his drops in an 11x11 box of Hellstone Brick. In Expert Mode, the Infernus Skull leaves its drops in a 7x7 box instead.


  • Infernon stays above the player and fires Infernal Wave.pngInfernal Waves at them that go through tiles and has a chance to inflict the On Fire! debuff on contact.
  • He will fire strings of 5 small Firespike.gifFirespikes which explode when they hit the ground.
  • He will stay still and summon flaming skulls that quickly home in on the player when they are in close range with them, otherwise they will fly away and despawn. These skulls have 65 / 130 / 195 health and they can be killed in a single or a few hits.
  • At 7000 health, he will summon the Infernus Skull, which will fire 8 Infernal Waves in a circle-like pattern along with two Fire Blast.pngFire Blasts at the player which explode on contact. The Infernus Skull does not move and will teleport to another place and repeat the attack again.

In Expert Mode

  • Infernon will attack at a slightly faster rate.
  • The Infernus Skull is summoned at the beginning of the fight.
  • Once Infernon has been defeated, the Infernus Skull will spawn and initiate as Infernon's final phase.


Image Name Condition
Infernus Skull.png Infernus Skull When Infernon reaches 7000 health / At start of fight
Infernon Skull.png Infernon Skull Always


  • 1.4.2:
    • Introduced a new music track.
    • Resprited.
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