Path of Ancestry is a rare Land card from Secret Lair Drop (SLD), collector number 250. Current market price: $3.70 (foil $4.64), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)