So, yesterday in Corlon's game, we faught a Cryohydra. It didn't last long, as it got criticalled by a ballista and shot with a fireball in the first round of combat, but there was much metagame speculation about hydras. 
I was just wondering of the opposite nature of Cryo and Pyro would disallow them to coexist on one Hydra. Is there an official ruling on this somewhere?
				
			I was just wondering of the opposite nature of Cryo and Pyro would disallow them to coexist on one Hydra. Is there an official ruling on this somewhere?