Delve too Deep is a uncommon Sorcery card from Unknown Event (UNK), collector number UB11. Current market price: $39.00, TCGplayer market prices via Scryfall.
Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Target creature gets -X/-X until end of turn. If X was 7 or greater, create a 7/7 black and red Demon creature token.