Delusion Illusion, originally inspired by the new card from the Knights of the Frozen Thrones, Archbishop Benedictus. Archbishop Benedictus does not seem to fit in and or influence the meta the much as other cards, so I decided to extract it's similar mechanics but made it with a twist.
Swapping your deck with your opponent first might potentially disable/completely shut down your opponent's combo deck plan. But then, you will be drawing cards from your opponent's deck, which might not seem too relevant in terms of priest game plan. So I decided to add one archbishop benedictus, and obtain a copy of your original deck.
Ok so this card is basically an anti aggro tool for control decks. I made it 7 mana because if it were say, 5 mana I feel like it would be way too powerful. You drop this card on turn 7, your opponent would take around 20 damage and you would heal for 20. You also get a 5/5 minion. The only drawback is that you discard all of the cards in your hand and that you draw cards for your opponent. If there are 4 cards in your hand when you play this card, you draw 2 and your opponent draws 2. If there are 3 cards in your hand, you still draw 2. In other words, it will always round up. So 5 cards = 3, 7 = 4, etc.
Also, this card could be used in some kind of discard control Warlock that will never be viable, where you would run this card and maybe a few other discard cards and activate your quest by turn 7 if you can draw into Psycho.
This card is also somewhat similar to Reno in that it can basically heal to full health but you don't need the "one of each card" requirement.