Universal Heat Death

You concentrate all your arcane energy inside of yourself and absorb the cold from the surrounding area to then build up into a cataclysmic explosion of arctic and chilling energy freezing everything within 150ft from you. All structures in the area will be demolished and all creatures within instantly die and freeze where they stand. For one hour the effected area will be the coldest place in the universe and considered a hostile environment with rough terrain. Any creature within range that has cold damage immunity will become frozen in place for an hour or until attacked.