Keen Buccaneer is a common Creature — Octopus Pirate card from Aetherdrift (DFT), collector number 48. Current market price: $0.19 (foil $0.26), TCGplayer market prices via Scryfall.
Vigilance Exhaust — {1}{U}: Draw a card, then discard a card. Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.)