Marshes Map (Atlas of Worlds)

Marshes Map (Atlas of Worlds) is a map that consists of two or three large swampy islands connected by wooden planks.

Boss Arena
The arena is also connected to one of the islands by a wooden plank. It's large and the boss is far from the entrance, which seals when the boss is engaged, until killed.

Boss Video
Карта болот (Атлас миров)