Blight Keeper

The activated ability wants eight mana before you tap and sacrifice the body, which settles the question of what this card is: a one-mana evasive flier first, a life-swing clause a distant second. The four-life drain is the kind of effect that closes out a grind, but at seven generic plus a black it only fires in the late game, when you have mana to spare and nothing more pressing to spend it on. The honest read is that the flying 1/1 is the real card, and the ability is insurance stapled to the bottom for the games that run long enough to want it. That structure (a cheap aggressive body that converts into reach once the board stalls) is a familiar black pattern, the same logic behind any small flier with a sacrifice payoff bolted on. Here the payoff is priced deliberately high, so it never distorts the early-game math: you deploy this to chip in for one in the air, and the drain is a bonus for the rare game where you flood out and need to find four points of life swing without any creatures in the way. Note the wording matters: the ability makes an opponent lose life rather than dealing damage, so it slips past damage prevention and combat-based defenses entirely. A modest card by design, built to be a clock that occasionally becomes a finisher.