Nowaru

I think that's exactly why I took the "Freezing" spell. Well, almost. The plan was to cast a trap spell on the first turn and immediately gain "3k HP" with an additional spell. Now I know exactly what to cast. Something similar on Arzach.
I still don't understand what happens to the "Ice Golems" after the battle ends. Do they melt on their own, or do I still need to destroy them?