Sacrificing lands can be used to a deck's benefit, whether its to trigger a specific effect or to increase the number of them in a graveyard, and cards like Elvish Reclaimer fit naturally into a strategy of abusing land effects
Black Uncommons Free sacrifice outlets are always a hot commodity, which is why Umbral Collar ZealotUmbral Collar Zealot has already found a home in a huge number of Aristocrat decks
8 Vren, the Relentless The Relentless Rat generator Bloomburrow brings us Vren, the Relentless
Countering a spell without paying mana is incredibly powerful , and countering your opponents combo pieces can win you the game
Creature-heavy decks adore these since they allow them to hunt for combo pieces or simply refill their hand to prepare for any incoming board wipes
Creatures (16) Lands (21) Spells (23) Sylvan Scrying to find Inkmoth Nexus is nothing new, but finding Kessig Wolf Run seems like an awesome plan if the game lasts more than a few turns