MACH-1, Swooping Scoundrel

The self-limiting clause is the whole engineering feat here. Lifegain triggers accumulate fast in a build that wants them: soul-sister effects, incidental drain, a well-oiled aristocrats loop can all fire a dozen times in a turn. A surveil that scaled with each of those would either be busted or force the designers to gate it behind a mana cost. Instead the "only once each turn" rider caps the payoff at a single look per turn, which reframes what the card wants from you. It is not a lifegain-count payoff; it is a proc that turns "did I gain life this turn" into a yes/no toggle for graveyard setup. The wrinkle worth flagging: "each turn" is per-turn, not per-turn-cycle, so incidental lifegain on your opponents' turns keeps arming the surveil around the table, one look per turn at most but potentially four looks per full rotation. That distinction makes the card read as consistent card selection rather than a runaway value spiral: you build around reliability (some lifegain most turns) instead of raw volume. The 1/3 flier is the tell, a body sized to survive and chip in the air while the surveil quietly bins reanimation targets and smooths draws over a long game, not a threat you are protecting through combat math. It is a graveyard-enabler dressed as a lifegain hook, and that per-turn governor is precisely what keeps those two identities from collapsing into a single overpowered one.