For Hearthhull, I think it comes down to the fact that this deck is dumping tons of lands into the graveyard and it most likely wins the game by bringing them all back in one go - using a card like Splendid Reclamation - for a mass of triggers
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Think Kolaghans Command, Jace, Vryns Prodigy, Collected Company or Dig Through Time foils at their peak dominance/price while in Standard
So far its looking like a slam-dunk, with excellent flavor and some powerful new designs to boot
