Leave that room
Head left from the room you just left.
There is a room that you will see on the left. Just go in there.
Head to the first door on the left and obtain the egg.
Once you leave, head straight ahead to the next room.
Put the egg on the table for the snakes.
The door will lock, don’t touch the snakes… grab the key.
Leave the room.
Head all the way to the save room. Leave that room from the door near the save point.
Go to the door on the right. Use the key and go in.