Aurorus

The diamond-shaped crystals on its body expel air as cold as -240 degrees Fahrenheit, surrounding its enemies and encasing them in ice.

Ability — Ice Shield: Any damage done by an opponent's attack to each of your Water Pokémon that has any Water Energy attached to it is reduced by 20 (after applying Weakness and Resistance).

Icy Wind (70): Your opponent's Active Pokémon is now Asleep.