Curse of Chaos
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Cheapest priced copy (Commander 2013): $0.39 at Card Kingdom, near mint, their price list as of .

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Curse of Chaos {2}{R}

Enchantment — Aura Curse · Uncommon · Commander 2013 · #105

Enchant player

Whenever a player attacks enchanted player with one or more creatures, that attacking player may discard a card. If the player does, they draw a card.

Legal inCommanderLegacyVintage

Not legal inBrawlStandardPioneerModernPauper

1 printing · $0.39 at Card Kingdom
SetNumberRarityCard KingdomFoil
Commander 2013105Uncommon$0.39—
6 rulings from Wizards of the Coast
  1. 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.
  2. 17 October 2013Curse of Chaos’s ability will trigger only once per attacking player per combat phase, no matter how many creatures that player attacks with.
  3. 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.
  4. 17 October 2013Curse is an enchantment type, not a creature type (or any other kind of subtype).
  5. 17 October 2013Each of the Curses can be attached to any player, including the player who cast the Curse.
  6. 17 October 2013The ability won’t trigger when a creature attacks a planeswalker controlled by the enchanted player.