Peering around the base of the forge, Doc found three iron bands, constructed separately from the main body of the forge and rivetted on later. They were marked (deeply etched) with a runic script that was most likely some arcane variant of the giant runic.
Doc couldn't read the words, but it didn't matter - he recognized a binding spell when he saw one. And the thing he knew about a binding spell was: If they're physically written, they can be physically broken.
The bad news was - they were solid iron bands made by Fire Giant hands. The good news was - there were plenty of tools on and around the anvil that were good for the right kind of leverage that might bust 'em off. If only there were a strong fellah, like a big northerner...