Wear costume pieces from 3 different sets at once

Kill an enemy by knocking another enemy into them

Become mutual followers with 10 people in South Park

Complete the Hippokrates questline.

All trophies have been awarded.

Name a Shulker Box with an Anvil.

Complete Markos's questline.

Kill the Leader of any Region with Low Resources, other than Megaris.

Complete all underwater location objectives.

Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.

Become Champion of the Arena.

Recruit and assign a Legendary NPC for your ship.

Defeat Medusa.