Crystal Carapace is a common Enchantment — Aura card from March of the Machine (MOM), collector number 183. Current market price: $0.18 (foil $0.13), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +3/+3 and has ward {2}. Cycling {2} ({2}, Discard this card: Draw a card.)