Scolex

Boss

Scolex is a large tapeworm boss found in The Womb and the Scarred Womb.

Behavior

Scolex is invulnerable to damage. Only his tail, which constantly blinks, can be damaged.

• Jumps out of the ground towards the player, then burrows back into the ground. This attack is repeated multiple times. If Scolex is hit by any explosion, he will be deflected back from the explosion when in midair.
• When Scolex's head pops out, he will shoot multiple blood shots of various sizes, similar to Monstro.
• When Scolex's tail pops out, he will fire three Red Ipecac

  Replaces tears with explosive and poisoning projectiles fired in an arc from the mouth.

  shots at the player.

Champion Versions

• Black: Scolex is larger, slower, and has more health.

Gallery

• 

  Scolex ingame.

• 

  Scolex's tail.

• 

  Scolex bugged with its sprite replaced by The Frail.

Notes

• Sometimes, several Lumps, Para-Bites, or Round Worms can accompany Scolex at the start of the battle.

Trivia

• Scolex can be considered an older or younger version of Pin, but not a posthumous one (that title goes to The Frail).
• A scolex is the name of the head of a tapeworm.
• Scolex was present in the original Binding of Isaac.
• Compared to the original Binding of Isaac, Scolex's head and tail attacks are swapped.
• Scolex bears some resemblance to a mythological Mongolian Death Worm, which are described as long, scaly, and blood red. It also raises half its body out of the sand and covers its prey with a lethal acidic substance, which is somewhat similar to Scolex's head attack.

Bugs

Bug! When Scolex is slowed, some of his body parts may detach or won't even show up - they will only be visible while entering the ground (especially the tail).

Bug! If the final vulnerable segment of Scolex's tail is destroyed using the Chaos Card, the boss will glitch and become harder to kill. The tail will appear again if his head gets bombed or he hits Isaac.

Bug! If you petrify Scolex (with Mom's Contacts or other similar items) when it is in mid-air, you can damage any segment of its body.

Bug! If you fire immediately upon entering the Boss Room, rarely, you can damage Scolex before it emerges.

Bug! If Scolex is under the effects of Broken Modem in mid-air, his jump will be stopped and he will fall.

Bug! If Scolex is frozen with Midas' Touch or Dad's Ring and attacked, he can split into two halves, one with his head and one with his tail.