Haunting Misery
A graveyard-to-damage converter built on a deliberately steep exchange rate: every point of reach costs a creature card permanently exiled from the yard. The design logic is conversion, not recursion. Where a deck full of dead creatures is usually so much spent material, this hands it a single burst of direct damage, but it taxes you one body per point and pays out at sorcery speed, so there is no instant-speed reach to surprise a tapped-out opponent and no way to bank the value for later. The whole engine resolves once. That structure makes it a closer for the kind of attrition deck that has already stocked its graveyard by attriting, where the creatures in the yard have outlived their usefulness and the only thing left to spend them on is the opponent's life total. The friction is that it competes for those same cards with anything else that wants a full graveyard, and an empty yard leaves it with nothing to convert. It belongs to the small family of black spells that treat the graveyard as ammunition rather than a recursion resource, asking you to decide when the dead are worth more spent than kept.
