Koga's Koffing (48/132) [Gym Challenge Unlimited]

[G] Smokescreen (10)
If the Defending Pokemon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.

[1G] Obscuring Gas (30)
Flip a coin. If heads, shuffle Koga's Koffing and all cards attached to it into your deck (after doing damage).