A Basic Pokemon Card of type Grass with the title Koga's Ekans and 50 HP of rarity Common from the set Gym Challenge.  It has the attack Fast-Acting Poison with the cost Grass, the energy cost 1 and the damage of 10 with the description: Flip 2 coins. If both are heads, the Defending Pokemon is now Confused and Poisoned. It has weakness against Psychic 2. 
Koga's Ekans