Dark Omastar

Card Number | Rarity: 019/105 | Rare
Card Type | HP | Stage: Water | 70 | Stage 2
Attack 1: [W] Prehistoric Water

If your opponent has any evolved Pokémon in play, choose 1 of them and flip a coin. If heads, your opponent takes the highest Stage Evolution card on that Pokémon and shuffles it into his or her deck.
Attack 2: [1W] Dark Tentacle (30)

During your opponent’s next turn, the Defending Pokémon can’t evolve except from effects of attacks or Pokémon Powers. (Benching that Pokémon ends this effect.)
Weakness | Retreat Cost: G | 2