Grandine

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.