I have killed Thorakus in Dragon's Eye level 3. A door is supposed open to go to level 4 but the door won't open. ANY help. Thanks. Yes, I've put all claws in the water.
You don't put the wyvern claws in the water. You have to use them to create wyvern potions in the same lab where you created the transformation potion. And you put the potions in those little tubs of water to open the door.