Slaking · Unified Minds (UNM) #170

Ability ⇢ Counterattack
If this Pokémon is your Active Pokémon and is damaged by an opponent’s attack (even if this Pokémon is Knocked Out), put 4 damage counters on the Attacking Pokémon.

{C}{C}{C}{C} → Dynamic Swing : 100+
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).