Cheapest priced copy (Commander 2015): $0.35 at Card Kingdom, near mint, their price list as of .
Curse of the Nightly Hunt 
Enchantment — Aura Curse · Uncommon · Innistrad · #137
Enchant player
Creatures enchanted player controls attack each combat if able.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2015 | 147 | Uncommon | $0.35 | — |
| Commander Anthology Volume II | 90 | Uncommon | $0.35 | — |
| Innistrad | 137 | Uncommon | $0.35 | $0.49 |
| The List | CM2-90 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 22 September 2011The enchanted player still chooses which player or planeswalker each creature they control attacks.
- 22 September 2011If, during the enchanted player’s declare attackers step, a creature they control is tapped, is affected by a spell or ability that says it can’t attack, or hasn’t been under that player’s control continuously since the turn began (and doesn’t have haste), then it doesn’t attack. If there’s a cost associated with having the creature attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.