Marwyn, the Preserver is a uncommon Legendary Creature — Elf Druid card from Reality Fracture (FRA), collector number 263. Current market price: $0.25 (foil $0.34), TCGplayer market prices via Scryfall.
Lands you control have hexproof. (They can't be the targets of spells or abilities your opponents control.) {2}: Return target land card from your graveyard to your hand.