There was no time to try and look for a key that might not be around. Instead, he moved to the side, and used a spell to detect how thick the wall was from his side to the other, and spent a half minute finding a nice, thin spot. A quick cast of the stone to mud spell, and he let it gloop out of the way a little bit before forcing it with a blasting charge. Assuming all that worked, he stepped through his newly created hole, and chuckled softly.