As long as Abomasnow is your Active Pokémon, any damage done to your Pokémon by an opponent's attack is reduced by 20 (after applying Weakness and Resistance).
Attack: Snow Play
Damage: 20
Does 20 damage to each of your opponent's Benched Pokémon, excluding Pokémon and Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Attack: Below Zero
Damage: 60
If Abomasnow evolved from Snover during this turn, the Defending Pokémon is now Paralyzed.