Swamp King's Retreat

Swamp King's Retreat is a single-purpose landmark: the community card says simply that it is home to The Crocodile King. The boss's own documentation fills in the picture - the Crocodile King, Scourge of the Marsh, is located in Swamp King's Retreat inside of the marsh, sitting on his throne, and spawns with a cooldown of roughly 5 minutes.

The fight that waits here is a crowned, morning-star-wielding crocodile hollow with yellow-kanji grabs and crumples in phase one, and a faster, weapon-discarding second phase triggered at 40% HP. Beating him pays out beyond loot: the King of the Swamp title (100 Soul Tokens and a Clan Token), Crocodile Scales, and the Strength Extract - one of the three items needed to open the Refund Shrine in the Soul Society Outskirts.

Reaching the retreat means braving the marsh itself, which per the community's equipment documentation requires the craftable Respirator for its toxic fumes. With the short 5-minute respawn, the retreat is one of the most farmable boss arenas documented in the game.