This is a large, muddy room with a small swamp on the left side.
A gigantic snake (MR 225) lives here. Since it is so massive you may
make a L1SR with a +8 modifier on Dexterity to not be hit that round,
although you may inflict normal damage. The doors magically close and will
only open when the snake is killed.
go to the door at the end of the room.