Koga's Koffing (Challenge from the Darkness No. 015)
$—
0
Grass
Smokescreen
10

If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.

Grass Colorless
Obscuring Gas
30

Flip a coin. If heads, shuffle Koga's Koffing and all cards attached to it into your deck (after doing damage).