Cheapest priced copy (The List): $0.69 at Card Kingdom, near mint, their price list as of .
Curse of Shallow Graves 
Enchantment — Aura Curse · Uncommon · Commander 2013 · #71
Enchant player
Whenever a player attacks enchanted player with one or more creatures, that attacking player may create a tapped 2/2 black Zombie creature token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.69 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2013 | 71 | Uncommon | $0.79 | — |
| The List | C13-71 | Uncommon | $0.69 | — |
5 rulings from Wizards of the Coast
- 17 October 2013Curse is an enchantment type, not a creature type (or any other kind of subtype).
- 17 October 2013Each of the Curses can be attached to any player, including the player who cast the Curse.
- 17 October 2013A Curse spell targets the player it will enchant like any other Aura spell, and a Curse stays on the battlefield like any other Aura. If the enchanted player gains protection from the Curse’s color (or any other characteristic the Curse has), the Curse will be put into its owner’s graveyard.
- 17 October 2013The ability won’t trigger when a creature attacks a planeswalker controlled by the enchanted player.
- 17 October 2013The Curse subtype has no inherent rules meaning, but two cards in the Innistrad set (Bitterheart Witch and Witchbane Orb) refer to Curses.