Cartouche of Ambition is a common Enchantment — Aura Cartouche card from Amonkhet (AKH), collector number 83. Current market price: $0.17 (foil $0.68), TCGplayer market prices via Scryfall.
Enchant creature you control When this Aura enters, you may put a -1/-1 counter on target creature. Enchanted creature gets +1/+1 and has lifelink.