Magna Centipede

Magna Centipede (alias "Magne Hyakulegger") is a Maverick in Mega Man X2. He dwells in the Central Computer, perhaps either to sabotage the humans, or perhaps guide other Mavericks. He acts like a ninja, and his weapon, Magnet Mine can seek out its targets. But use Silk Shot, and his tail breaks off, forcing him to limit his tactics. Keep using Silk Shot to destroy him.

(Spoiler alert) It should be noted that the Central Computer stage is also where the final battle takes place.