Cheapest priced copy (Amonkhet): $0.35 at Card Kingdom, near mint, their price list as of .
Cartouche of Zeal 
Enchantment — Aura Cartouche · Common · Amonkhet · #124
Enchant creature you control
When this Aura enters, target creature can't block this turn.
Enchanted creature gets +1/+1 and has haste. (It can attack and {T} no matter when it came under your control.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Amonkhet | 124 | Common | $0.35 | $0.79 |
| Foundations Jumpstart | 529 | Common | $0.35 | — |
| The List | AKH-124 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 18 April 2017Each 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 April 2017Cartouche is an enchantment subtype with no special meaning. Other cards may care about which enchantments are Cartouches.
- 18 April 2017If the target creature becomes an illegal target before a Cartouche spell resolves, the spell doesn't resolve. It doesn't enter the battlefield.