The Bell Beast is the first main boss you'll encounter after leaving the starting area in Silksong, and it might give you quite the challenge until you master its moves. You'll find this cute (and terrifying) critter at the top of The Marrow, near the map merchant Shakra, as well as the path to Mosshome.
The Bell Beast is trapped in silk when you first find it, requiring you to first head in the opposite direction, into Mosshome, to unlock the Silk Spear skill. This'll let you break silk strands, like the ones restraining the Bell Beast. Unfortunately, freeing this beast leads to a boss fight, though a rewarding one, as you'll unlock fast travel in return for giving it a good whack.
