Hearthpwn

A lot of people are down on this card. I get it, you have to spend an entire turn to play it, really bad if you can't afford the tempo loss. But think about it like this: you slot in Pocket Galaxy, Alexstrasa, Antonidis, and Malygos, and you have some serious game ending power here, a real win condition. The entire rest of your deck can focus on surviving, freezing, wiping the board, and stalling.

As soon as you play Pocket Galazy, you can win the game on the spot on a future turn. This gives the deck strong matchups against other combo decks and control decks. If you can make it good enough VS Aggro, this could be an S tier deck. Cards like baleful banker become very strong, because if you draw Antonidis too soon you can put it back in the deck, ensuring you have a strong late game against other late game decks.

You can spend 4 card slots to have a definitive win condition, it seems worth it to me. Against other control/combo decks you can even mulligan for Pocket Galaxy and keep it in your starting hand.