Bemused by his predicament, Dreadnought realizes with some dismay that he does not have a small enough blade to try to saw his way out. In the past, when his sword proved inappropriate, he'd simply relied on his crushing fists.
In hindsight, it was a single gold piece of an oversight that might cost him significantly more.
Even so, he is not one to simply give up. He twists a bit, trying to get leverage, then drives his powerful adamantine fist up into the creature's stomach lining, hoping to hit delicate internal organs!
(hee...silly me...no light weapons besides his natural attack, which is blunt. But I believe I can at least do damage with it, yes?)
Attack roll 21 (17 if he's still considered grappled):
http://invisiblecastle.com/roller/view/1506518/
Damage is 9:
http://invisiblecastle.com/roller/view/1506519/