Fblthp, the Lost is a rare Legendary Creature — Homunculus card from Ravnica Remastered (RVR), collector number 44. Current market price: $0.35 (foil $0.35), TCGplayer market prices via Scryfall.
When Fblthp enters, draw a card. If it entered from your library or was cast from your library, draw two cards instead. When Fblthp becomes the target of a spell, shuffle Fblthp into its owner's library.