Dig Through Time is a rare Instant card from Khans of Tarkir Promos (PKTK), collector number 36s. Current market price: — (foil $7.15), TCGplayer market prices via Scryfall.
Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Look at the top seven cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.