Overchilled Spell

You are able to channel incredible power into spells that use cold to damage foes. You are able to make a spell of 1st level or higher that deals cold damage deal the highest amount of cold damage possible (for example instead of rolling 8d8 damage you would deal 64 damage). However, when you use this, it harms you. You take 1d10 unavoidable cold damage for each level of the spell whose power was maximized (a 3rd level spell would deal 3d10 damage, a 5th level spell 5d10 damage, etc). Because it is unavoidable, this cold damage ignores all resistances and immunities that you might have to cold damage.