| Boss Pool|
|Beat the Cathedral 10 times|
Triachnid is an alternative version of Daddy Long Legs.
His attacks are very similar to the attacks of Daddy Long Legs. He has three different attacks:
- He can stomp on the ground in random locations with his three legs, leaving white slowing Creep.
- He can cough up a Trite.
- He can lift his head and stomp one foot at a time, followed by slamming his head into the ground, firing blood shots in eight directions and leaving white slowing creep.
- Triachnid originated from the 2006 flash game Tri-achnid, which was created by Edmund McMillen.
- Unlike the other three alternate bosses, Steven, C.H.A.D., and Gish, Triachnid does not drop a specific item.
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