Tireless Tracker is a mythic Creature — Human Scout card from Special Guests (SPG), collector number 26. Current market price: $3.70 (foil $16.69), TCGplayer market prices via Scryfall.
Landfall — Whenever a land you control enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Whenever you sacrifice a Clue, put a +1/+1 counter on this creature.