Samwise the Stouthearted

Flash on a two-mana white body is already a rate that respects the instant-speed window; what makes this one interesting is the exact clause bolted to it. The trigger recovers a permanent that hit your graveyard from the battlefield this turn, which turns a fragile 2/1 into a response, not a rebuild. Flashed in during combat, it undoes a trade after damage resolves; held up in the second main, it answers a sacrifice effect or a burn spell by catching the thing that just died and putting it back in your hand. That "this turn, from the battlefield" restriction is the discipline: it cannot dig up a five-turn-old bomb or loop the graveyard, only reclaim what an opponent just took off the board. The line does the structural work that a protection spell does elsewhere (blunting removal at the moment it lands) while dressing it as recursion rather than a counterspell. Layered on top is the Ring tempting you, folding a small snowballing engine into a card whose primary job is a clean two-for-one at the exact instant a permanent leaves play. The flavor lands cleanly too: a loyal halfling who shows up precisely when something has been lost, to carry it back.