Hit the Mother Lode is a rare Sorcery card from The Lost Caverns of Ixalan Promos (PLCI), collector number 153p. Current market price: $0.91 (foil $0.53), TCGplayer market prices via Scryfall.
Discover 10. If the discovered card's mana value is less than 10, create a number of tapped Treasure tokens equal to the difference. (To discover 10, exile cards from the top of your library until you exile a nonland card with mana value 10 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)