Elvish Refueler is a uncommon Creature — Elf Druid card from Aetherdrift (DFT), collector number 161. Current market price: $0.23 (foil $0.30), TCGplayer market prices via Scryfall.
During your turn, as long as you haven't activated an exhaust ability this turn, you may activate exhaust abilities as though they haven't been activated. Exhaust — {1}{G}: Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.)