Oceanus Shenron, Negative Energy Explosion

[Block] [Counter:Attack] Choose 1 card in your hand and discard it : Negate the attack and play this card. If you played a card, your opponent can't attack for the turn unless they place the top 4 cards of their deck in their Drop Area each time. [Permanent] During your opponent's next turn, reduce the energy cost of this card in your hand by 3. [Auto] If your Leader Card is a "Shadow Dragon" card : When this card is played from your hand or discarded by a "Shadow Dragon" card's skill, you may look at the top card of your deck, if it's a black "Shadow Dragon" card you may add it to your hand, otherwise, place it at the bottom of your deck.