Toya might be dead either way. If you rapidly cool down a really hot thing it breaks. Like in that Pokemon episode from X and Y when they tried to super heat and cool a piece of bedrock, but it didn't work because its bedrock. It was resistant. Going on from the resistant part since toya has a resistance to cold maybe he will live. But heyyyyyyy basic physics am i right? (I think its physics idk) So basically you do something, hes dead. You do nothing, hes still dead.