Veinwitch Coven

Two black staples that rarely shared a slot cleanly, the aristocrats loop and the lifegain payoff, meet here in a single 3/3 body. The trigger is deliberately wide open: any life gain from any source, incidental or engineered, offers you the option to pay a black and pull a creature card back from your graveyard to your hand. That per-instance black tax is the throttle. Without it, a lifelink attacker or a repeating drain would empty your yard in a single turn; with it, each recovery costs real mana, so the coven scales with your resources instead of running away on its own. The design rewards decks that were already gaining life for other reasons by handing them a second dimension, and the menace gives the body a clock so you are not just sitting behind a value engine waiting for the game to come to you. There is a real sequencing wrinkle too. You lock in the target creature when the ability triggers, before you have decided whether to spend the mana, so you commit to what comes back first and only choose to pay the black once the ability resolves. Read those windows correctly enough times and the graveyard stops functioning as a dumping ground and starts working as a second hand you refill one black mana at a time.