You mean the slime room, right? I tried to enter the three rooms in the slime room, but I can't get in. I tried again because it seemed like a bug, but I can't get into the room with the shovel.Please save me.
Oh no I meant the sewer, it's the hole found in the cell, you can use an item in your inventory to descend from there, stand on the glowing circle and use it from inventory