Adaptive Gemguard is a common Artifact Creature — Gnome card from The Lost Caverns of Ixalan (LCI), collector number 3. Current market price: $0.10 (foil $0.13), TCGplayer market prices via Scryfall.
Tap two untapped artifacts and/or creatures you control: Put a +1/+1 counter on this creature. Activate only as a sorcery.