Enchant creature you control
When Cartouche of Ambition enters, you may put a -1/-1 counter on target creature.
Enchanted creature gets +1/+1 and has lifelink.
The target creature for the triggered ability of Cartouche of Ambition doesn't have to be the creature it enchants.
18-04-2017
wotc
If the target creature becomes an illegal target before a Cartouche spell resolves, the spell doesn't resolve. It doesn't enter the battlefield.
18-04-2017
wotc
Each Cartouche is an Aura with "Enchant creature you control." 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 owner's graveyard as a state-based action.
18-04-2017
wotc
Cartouche is an enchantment subtype with no special meaning. Other cards may care about which enchantments are Cartouches.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.