In the Generation VII games, if hail has its duration extended by the Icy Rock, the turn counter on the user interface for these effects will indicate that it lasts for 8 turns for the player whose Pokémon used the move, while it will display that it lasts for 5 turns for their opponent. After 5 turns of hail have passed, the user interface will display that it lasts for 8 turns for both players.
An Icy Rock is an ingredient that can be used in cooking to attract wild Pokémon in Pokémon Quest. It is considered a blue ingredient that is hard, precious, and a mineral.