Guile is a rare Creature — Elemental Incarnation card from Lorwyn (LRW), collector number 69. Current market price: $0.98 (foil $18.00), TCGplayer market prices via Scryfall.
This creature can't be blocked except by three or more creatures. If a spell or ability you control would counter a spell, instead exile that spell and you may play that card without paying its mana cost. When Guile is put into a graveyard from anywhere, shuffle it into its owner's library.