Oreskos Explorer is a uncommon Creature — Cat Scout card from Battlebond (BBD), collector number 100. Current market price: $0.18 (foil $6.27), TCGplayer market prices via Scryfall.
When this creature enters, search your library for up to X Plains cards, where X is the number of players who control more lands than you. Reveal those cards, put them into your hand, then shuffle.