Bardragul

Bardragul is a World Boss found inside Pirate Grotto. He has numerous Dread Pirate Gula minions that each award a kill toward achievements like 5,000 Bosses.

There is actually a short story written about this character.

Links

 * It's Good to be the (Slave) King By R. K. MacPherson Massively/Endgadget ( https://archive.ph/4MWMU )