Usbak the Old (Ranger Epic Mob)
 

I can't find a lot of information on him other than he spawns as part of the Hammer portion of the Ranger Epic.

Does he despawn when the Ancient Sword is turned in or does he stay up for a period of time (could multiple rangers bypass the hole kill)?

He despawns. Look out for dickheads who steal the turn in, btw.

Drat, was afraid of that. Thank you!!!