How do I know when a spawns World Boss?[]
A random World Boss has a 50% chance to spawn every 10-20 minutes (0:20, 0:40, 1:00, etc.) regardless of when you killed the last world boss.
World bosses don't despawn and only one can be in the server at a given time, meaning if Shanks spawns, he will stay spawned until you kill him, and no other boss will spawn.
Shanks spawns on Shanks Island (Now known as Red Hair Island)
Big Mom spawns on Volcano Island.
Kraken spawns randomly in the water near Dawn Island, Volcano Island, Tall Island, and Leopard Island.
Whitebeard spawns on Ruined Marine ford (Now known as Destroyed Marine HQ).
In the recent QOL update, World bosses now spawn with a 100% chance after Two failed tries. Also they can be spawned by using World Call.