Squirming Emergence is a rare Sorcery card from The Lost Caverns of Ixalan Promos (PLCI), collector number 241p. Current market price: $0.52 (foil $0.70), 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.