Deeproot Wayfinder is a rare Creature — Merfolk Scout card from March of the Machine Promos (PMOM), collector number 184p. Current market price: $0.39 (foil $0.29), TCGplayer market prices via Scryfall.
Whenever this creature deals combat damage to a player or battle, surveil 1, then you may return a land card from your graveyard to the battlefield tapped. (To surveil 1, look at the top card of your library. You may put that card into your graveyard.)