A Basic Pokemon Card of type Water with the title Misty's Tentacool and 50 HP of rarity Uncommon from the set Gym Heroes.  It has the attack Crystal Beam with the cost Water, Colorless, the energy cost 2 and the damage of 20 with the description: Flip a coin. If heads, your opponent can't attach Energy cards to the Defending Pokemon during his or her next turn. It has weakness against Lightning 2. 
Misty's Tentacool