If, before Gliscor does damage, the Defending Pokémon has no damage counters on it and is then damaged by this attack (after applying Weakness and Resistance), the Defending Pokémon is now Paralyzed.
This card was released in the Undaunted expansion, originating from the Japanese Reviving Legends expansion. An exclusive Cracked Ice Holofoil print was included in the Stage 1 Blisters released in November 2011.