#Kill the Boss Ice Man(Shield) on the first floor to get Odder Tale
#Then we find the warp to the 2nd floor of ice castle.
#Once inside, go right ahead, tight wall of ice until saw a warp of sword.
#At the entrance, there is another boss, kill the boss Ice Man(Sword), then you will Mystery Key
#With this key you can enter Mystery Warp on the second floor
Note : The boss will also drop box, you can have various items from this box