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Loki full

Offical artwork by Edmund McMillen

Related Boss(es):


  • Firing 4 bullets in diagonal direction
  • Firing 4 bullets in cardinal direction
  • Firing 8 bullets around him
  • Spawning Boom Fly
  • Spawning Red Boom Fly

Effective item(s):


Loki is a boss found in the Depths. He resembles a red demon Baby with four arms, small horns and The Mark on his forehead. In Wrath of the Lamb, a posthumous version of Loki called Lokii appears as a boss in The Womb and Utero, appearing as Loki split in half.


His main attack has three steps. He makes poses whilst attacking. First, he shoots 4 projectiles in a plus shaped pattern, followed by 4 shots in an X shaped pattern, and finishing with another 4 shots in a plus shapped pattern. His other attack shoots 8 projectiles in a circle around him.

He also randomly teleports himself during the fight.

He is sometimes assisted by a single Poky. At times, he may summon Boom Flies to accompany him, which can damage him upon exploding.


  • It is rare to find him as a boss. He is, however, very common in Sheol (encountered in pairs) and sometimes can be encountered in The Womb. He can be encountered in triplicate in The Chest.



  • Loki is also referred to as "Baby Demon" and "Fetus Demon" in the Unholy Edition art booklet.
  • During developement Loki's codename was "Mr.Cool". 1
  • It was confirmed by Edmund on Formspring that Loki indeed possesses two pairs of arms.
  • In Norse mythology, Loki is the god of mischief and chaos.


The Binding Of Isaac LOKI00:55

The Binding Of Isaac LOKI

Basement Larry Jr.MonstroThe Duke of FliesGeminiStevenFamine
Cellar WidowPinThe Duke of FliesFamineGurdy Jr.The Blighted Ovum
The Caves FistulaPeepGurdyChubC.H.A.D.Pestilence
Catacombs The HuskThe HollowThe Blighted OvumThe Carrion QueenPeepPestilenceThe WretchedGurdy Jr.
The Depths LokiMonstro IIGishWarMom
Necropolis Mask of InfamyDaddy Long LegsThe Carrion QueenThe BloatLokiWarThe WretchedMom
The Womb ScolexBlastocystThe BloatDeathConquestDaddy Long LegsTriachnidTeratomaMom's HeartIt Lives
Utero TeratomaThe BloatDeathConquestDaddy Long LegsTriachnidLokiiMom's HeartIt Lives
Sheol The FallenSatan
Cathedral Isaac
The Chest ???
First to fifth and seventh level The FallenHeadless Horseman
Devil Room Krampus

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