This Ability effect may be in need of research. Reason:Do Foul Play or Strength Sap get affected? You can discuss this on the talk page.
In battle
Tablets of Ruin decreases the Attack stat of all Pokémon on the field other than Pokémon with this Ability by 25%. The effect does not stack if more than one Pokémon with Tablets of Ruin is on the field.