Vampire Scrivener

The trick this design pulls is that it does not care which direction your life total moves. Most life-matters payoffs pick a lane: aristocrats shells want you bleeding out, lifegain decks want you climbing. Here both triggers point the same way, so any turn where the number swings at all (a drain resolving, a life payment for a spell, a lifelinker connecting) grows the body. That symmetry is what makes it easy to feed. You are not building toward a specific engine so much as running any deck where your own life total rarely sits still, and in black those decks are common. The catch is the qualifier both triggers share: the movement has to happen during your turn. A drain resolving on your opponent's turn, a fetch cracked in response to their removal, damage soaked from an attacker: none of it counts. That restriction is the reason a 2/2 flier can accumulate counters this freely and still cost five mana. It rewards you for doing the life swinging on your own clock rather than reactively, which nudges the surrounding deck toward proactive drains and self-payments over defensive ones. As a growing evasive threat that only asks the deck to keep its own life total in motion, it sits in a quieter branch of black's counter-accumulation lineage than the aristocrats staples, but the ceiling on a single unblocked turn is real.