To defeat the Galdon and get the first spelllstone, you must first get Tricky to use his flame command on the giant ice sculpture in the room. Galdon will defrost and attack, keep cercling him until you get his "but" in view and shoot a fireball, do this three times then Galdon will swallow you. Hit the thing dangling in the air 4 times. After he will spit you out and attack again. He spits a ton of green toxic balls at you then the thing in his chest will open, shoot a fireball in three times and he'll swallow you again. Do the same thing you did the first time and he's dead.