Squirming Emergence is a rare Sorcery card from The Lost Caverns of Ixalan (LCI), collector number 386. Current market price: $0.39 (foil $0.83), TCGplayer market prices via Scryfall.
Fathomless descent — Return to the battlefield target nonland permanent card in your graveyard with mana value less than or equal to the number of permanent cards in your graveyard.