Scolex

Scolex is a boss that can appear in and the.

Behavior
Scolex is only vulnerable in his blinking tail segment. He burrows into the ground before performing the following attacks:
 * Jumps out of the ground towards Isaac, burrowing back into the ground at the end of the jump.
 * If Scolex is hit by an explosion while mid-air, he will be deflected backwards.
 * Partially emerges head-first and shoots out a cluster of projectiles towards Isaac, similar to Monstro, but with a wider spread.
 * After performing this attack, Scolex will always jump out of the same spot he entered.
 * Partially emerges tail-first and fires cluster of 3 red shots towards Isaac.
 * After performing this attack, Scolex will always jump out of the same spot he entered.

Champion Versions

 * Dark Grey: Scolex is 15% larger, slower, and has 25% more HP (375).

Trivia

 * Scolex appeared in the original The Binding of Isaac.
 * 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.
 * 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
Scolex