Changes the weather to hail for five turns, during which non-ice Pokémon are damaged for 1/16 their max HP at the end of every turn. If the user is holding icy rock, this effect lasts for eight turns. blizzard has 100% accuracy. If the target has used detect or protect, blizzard has a (100 - accuracy)% chance to break through the protection. moonlight, morning sun, and synthesis heal only 1/4 of the user's max HP. Pokémon with snow cloak are exempt from this effect's damage.