Slaking UNM 170

If this Pokémon is your Active Pokémon and is damaged by an opponent's attack (even if this Pokémon is Knocked Out), put 2 damage counters on the Attacking Pokémon.

You may do 100 more damage. If you do, during your opponent's next turn, this Pokémon takes 100 more damage from attacks (after applying Weakness and Resistance).