You can't have more than 1 cards with the same name in your deck. If a card would go in the discard pile, put it in the Lost Zone instead.
Darkrai
160 HP
You can only have 1 Prism Star Card of the same name per Deck
Nightmare Star
When you play this card from your hand onto your bench during your turn, you may attach 2 Energy from your hand to it
Abyssal Sleep
Your opponent's Active Pokémon is now Asleep.Your opponent flips 2 coins instead of 1 between turns. If either of them is tails, that Pokémon is still Asleep