Night Nurse, Healer of Heroes

The recursion clause is narrower than white's usual graveyard toolboxes, and that narrowness is exactly what makes flash the load-bearing part. The window only opens for a permanent card that hit your graveyard this turn, from anywhere: something that died in combat, got sacrificed, was bounced-to-graveyard, or a fetchland you cracked earlier in the turn. What it cannot reach is the sweeper victim from three turns back or a graveyard you have been banking over time. Flashing this in during your opponent's combat, after a blocker trades away, hands the casualty back before end of turn while a lifelinking 2/1 stays behind. Most of white's return-from-graveyard effects are sorcery-speed engines that ask you to plan a loop in advance: Sun Titan wants a repeatable trigger, Reveillark wants a body to sacrifice on schedule. This one asks you instead to hold up two mana and let the graveyard fill itself in response to what the game does. The lifelink and the flash body do double duty in the same slot: an ambush blocker that gains life and rebuys a fresh casualty is a genuine tempo swing rather than a value loop. The "this turn, from anywhere" restriction keeps it from ever becoming open-ended, since you cannot stockpile a graveyard across several turns and redeem it all at once. It is a small, precise instrument for turning your own attrition into a resource, shaped for the player who wants to react rather than assemble.