Ghoultree

The cost reduction is the whole bargain, and it inverts the usual graveyard-payoff logic. Most cards that care about a stocked graveyard reanimate from it, exile it, or grind it for value; this one leaves every creature card right where it is and simply charges you less for an enormous body. A 10/10 with no evasion, no trample, no protection is laughably overpriced at face value, but the reduction can collapse that to a couple of mana once self-mill or a long attrition game has filled the bin. That puts the design in a strange spot in green's curve: it is a top-end finisher you cast cheaply, a plain beater whose only sophistication is the discount on the way in. The tension is real. Spend the early turns dumping creatures into the graveyard and you sacrifice board presence to make a future spell affordable; rush it out and it costs full freight. It rewards the self-mill and dredge-adjacent shells that were already filling their own graveyards for other reasons, where this rides along as a finisher rather than a goal in itself. The reduction only touches the generic portion of the cost, so the floor is : a one-mana 10/10 when enough creature cards fill your graveyard, and a back-breaking eight-mana beater when the graveyard is empty. The same card, valued entirely by how much work your graveyard has already done.