Enchantment â Aura Cartouche
Enchant creature you control
When Cartouche of Knowledge enters the battlefield, draw a card.
Enchanted creature gets +1/+1 and has flying.
If the target creature becomes an illegal target before a Cartouche spell resolves, the spell doesnâ€™t resolve. It doesnâ€™t enter the battlefield.
Each Cartouche is an Aura with â€œEnchant creature you control.â€ If another player gains control of either the Cartouche or the enchanted creature (but not both), then the Cartouche will be enchanting an illegal permanent and be put into its ownerâ€™s graveyard as a state-based action.
Cartouche is an enchantment subtype with no special meaning. Other cards may care about which enchantments are Cartouches.