Rabid Bloodsucker

The symmetric life loss is the tell. A 3/2 flier that pings each player, you included, for two is not a drain that scales with your board or feeds you anything back; it is a fixed downside disguised as a trigger, and it only makes sense in a deck already ahead on the clock. That self-inflicted cost is the whole reason it reads as filler rather than a threat: the enter-the-battlefield effect rewards whoever is closer to lethal, and the modest body asks you to already be that player before the two points seal the race. This is common-rarity material built to round out an aggressive black curve without warping anything around it: evasion to fly over a clogged ground stall, plus a nudge back toward the finish line for a race you were already winning. As a Vampire with flying and a life-loss trigger, it drops into tribal and life-loss shells without doing anything those decks could not source more efficiently elsewhere. A closer for the game that was already going your way, and little more.