You see Dirtbeard
- You are no match for the scourge of the seas!
- You move like a seasick whale!
- Yarr, death to all landlubbers!
It's the second floor boss. Use his body to get a random reward before you use the body of Evil Mastermind, otherwise you may not get any item. Probably an allusion to Blackbeard.
Damage Taken From Elements
He runs in low health.
Kill it fast.