Vanguard Seraph

The interesting move here is the once-per-turn clause, not the lifegain itself. White has a long history of stapling small graveyard-filtering or card-selection triggers to lifegain, but most of those payoffs scale with each individual gain, which pushes them toward soul-sisters shells that spam tiny life triggers. This one caps the reward at a single surveil per turn, which reorients the incentive: you are not trying to gain life ten times, you are trying to gain life once and then get on with attacking. That constraint keeps the card honest as a body first and an engine second. A 3/3 flyer that quietly filters your draws whenever any incidental lifegain fires (a lifelink hit, a fetch off a food token, a soul warden trigger you already had) is doing two clean jobs without demanding a dedicated build around it. The surveil is deliberately modest: one card, look-and-maybe-bin, which feeds graveyard synergies and smooths your draw step without generating raw card advantage. It reads as a design meant to reward lifegain decks that want to close games in the air rather than durdle, giving them evasion and light card quality in a single slot instead of asking them to run yet another payoff whose value only materializes when the life total is already ballooning.