Sarinth Steelseeker is a uncommon Creature — Human Artificer Scout card from The Brothers' War (BRO), collector number 189. Current market price: $0.22 (foil $3.66), TCGplayer market prices via Scryfall.
Whenever an artifact you control enters, look at the top card of your library. If it's a land card, you may reveal it and put it into your hand. If you don't put the card into your hand, you may put it into your graveyard.