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Boss Triachnid name.png
Boss versus screen image
Base HPStage HP
Removed in Repentance 300
Added in Repentance 500
Table dividing line 1.png
Ingame Appearance
In-game appearance

Entity ID
Table dividing line 2.png
Found In
Removed in Repentance
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage The Void icon.png
Added in Repentance
Stage Utero icon.pngStage Scarred Womb icon.png
Stage The Void icon.png
Table dividing line 3.png
Dropped Items
Boss Boss
Unlock Method
Something Icky Defeat Isaac 10 times

Triachnid is a boss that can appear:

Behavior[edit | edit source]

Triachnid's head hangs down stationary and can perform the following attacks:

  • Raises his head and stomps the ground in random locations around the room 3 times in quick succession, leaving small puddles of slowing White Creep.
    • His head cannot be damaged until lowered after the attack.
    • The appendages that he stomps with can be attacked to damage him.
  • Lifts his head off-screen and stomps the ground 3 times at regular intervals on top of Isaac's position. At the end of the stomps, he slams his head down quickly in the center, center-left or center-right (whichever is closer to Isaac's position), shooting 8 white projectiles in all directions and creating a large puddle of White Creep.
    • Occasionally performs a fourth stomp before slamming his head down.
    • Occasionally, when he slams his head down, he leaves a larger puddle of White Creep, but only shoots 4 white projectiles in the cardinal directions.
    • The appendages that he stomps with can be attacked to damage him.
  • Spits out a Trite in Isaac's direction.

Gallery[edit | edit source]

Notes[edit | edit source]

  • Added in Repentance Triachnid no longer spawns in The Womb.
  • Added in Repentance Unlike all other other alternative versions of bosses such as Dangle, C.H.A.D, and Gish, Triachnid has the same weight as his alternative boss form.
    • Although they share the same weight, Triachnid is actually more common than Daddy Long Legs, since he also appears in Scarred Womb.

Trivia[edit | edit source]

  • Triachnid was added in the Wrath of the Lamb DLC for the original The Binding of Isaac.
    • IN the original Binding of Isaac, Triacnid could be encountered in Necropolis Necropolis.
  • Triachnid originated from the 2006 flash game Tri-achnid, which was created by Edmund McMillen.
  • He is an alternative of Daddy Long Legs.
  • While Daddy Long Legs uses 4 appendages in his attacks, Triachnid is reduced to mostly only using 3; this is most likely in homage to the fact that Triachnid in his title game only had 3 appendages.
  • Triachnid's unlock method is possibly a reference to a bug in the original Wrath of the Lamb that caused Triachnid to occasionally replace Isaac in the Cathedral.
  • Removed in Afterbirth † Triachnid does not have a death animation.
  • Added in Afterbirth † Triachnid can be found in The Void The Void, even before being unlocked.

Bosses Boss Monstro.png
Chapter 1
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
GeminiStevenBlighted OvumDingleThe Duke of FliesFamineGurglingsThe HauntLarry Jr.MonstroPinWidowThe FallenThe Headless Horseman
DangleLittle HornRag ManTurdlings
Baby Plum
Chapter 1.5
Stage Downpour icon.pngStage Dross icon.png
Lil BlubWormwoodThe RainmakerMin-MinClogColostomiaTurdlet
Chapter 2
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
FistulaChubC.H.A.D.Carrion QueenDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe WretchedThe FallenThe Headless Horseman
The ForsakenThe FrailThe Stain
Big HornRag Mega
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png
Reap CreepTuff TwinsHornfelGreat GideonSingeThe ShellThe Pile
Chapter 3
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateMonstro IIGishLokiMask of InfamyWarThe FallenThe Headless HorsemanMom
Sisters Vis
Reap CreepThe Pile
Chapter 3.5
Stage Mausoleum icon.pngStage Gehenna icon.png
The SirenThe HereticThe VisageThe Horny BoysMomMom's Heart
Chapter 4
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
BlastocystThe BloatConquestDaddy Long LegsTriachnidDeathLokiiMama GurdyMr. FredScolexTeratomaThe FallenThe Headless HorsemanMom's HeartIt Lives
Sisters VisThe Matriarch
Stage Corpse icon.png
ChimeraThe ScourgeRotgutMother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
Chapter 6
Stage Dark Room icon.pngStage The Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Stage Home icon.png
DogmaThe BeastUltra DeathUltra FamineUltra PestilenceUltra War
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
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