Koskun Falls [Homelands] Magic 2011 detain target creature an opponent

detain target creature an opponent controls

you may sacrifice an artifact

Set: Khans of Tarkir Prerelease Promos Type: Instant Rarity: Rare Cost: {R}{W} The next time a source of your choice would deal damage to you this turn

If that mana is spent on an instant or sorcery spell

Koskun Falls [Homelands] Magic 2011 detain target creature an opponentSet: Homelands Type: World Enchantment Rarity: Rare Cost: {2}{B}{B} At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control. Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.