Scolex Worm

Ken Ogawa facing one of many Scolex Worms.

The Sclolex Worm is a boss encountered on Missions 2 and 9. It's first appearance is in Mission 2, where Ken Ogawa faces one early in the begining. Two Scolex Worms also assist Plague Snail during at the end. In Mission 9, 3 Scolex Worms can be faced, though depending on which path you take, you may not have to fight the third one.