Persistent Constrictor

Two of black's favorite attrition tools, folded into one body. The upkeep trigger is a one-sided bleed that comes around the table serially: at the start of each opponent's upkeep, that player loses a life and you may shrink one of their creatures with a -1/-1 counter. Because it fires once per opponent, a full turn cycle in a four-player game means three separate drains and three shrinking creatures, a clock that thickens as the table fills. Persist is the second half of the design, and it interlocks with the first in a way that reads awkward but plays clean: the self-inflicted counter Persist leaves behind means the creature returns only once, yet that single loop is enough to shrug off a targeted answer and keep the upkeep engine humming for another lap. The tension is the 5/3 frame. Three toughness is fragile enough that opponents will trade into it eagerly, and Persist turns each of those trades into a tempo tax rather than a real answer, forcing them to spend a second removal spell or eat another round of drains. It is less a beater than a metronome, a card that wants to sit on the board and tick while the -1/-1 counters it hands out pile onto opponents' creatures for a proliferate build to exploit. What gives it teeth is a timing choice its own return creates: knowing exactly when to let it die, so the counter it comes back with is a cost you have already banked rather than a downgrade you regret.