Cursing at the burning, Ancalagon smiles at the pain, but does not lash out again, he needed to be careful with this one, he was being careless. Trying to get some defenses on, he hisses in pain as the acid burns deeper, burning a major nerve of his left arm, making it spasm and him lose the spell. He moves back playing his back ot the door, realizing this was going to hurt...ALOT.