vorago
Gigantic, rocky group boss monster in RuneScape. Its name comes from the Latin word for "abyss". It's actually friendly, but can be challenged to an extremely difficult fight.
He is immortal and can only be stopped by a hammer forged from the weapon fragments embedded in him (wielded by Reimu in post #2287712. But even if defeated this way, he will still reform.
See also
- Mega Man, also called Rockman (in Japan)