Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you
Set: Antiquities Type: Enchantment Rarity: Uncommon Cost: {B}{B} Sacrifice a creature: Destroy target artifact
Set: Arabian Nights Type: Creature — Plant Rarity: Rare Cost: {3}{G} {T}: Target attacking creature has base power 0 until end of turn
Set: New Phyrexia Promos Type: Instant Rarity: Rare Cost: {B/P} ({B/P} can be paid with either {B} or 2 life
Set: Beta Edition Type: Instant Rarity: Common Cost: {R} Lightning Bolt deals 3 damage to any target
Scathe Zombies [Alpha Edition] Battle for Zendikar Promos Creatures can't attack you unlessSet: Alpha Edition Type: Creature Zombie Rarity: Common Cost: {2}{B} "They groaned, they stirred, they all uprose, Nor spake, nor moved their eyes; It had been strange, even in a dream, To have seen those dead men rise." Samuel Coleridge, "The Rime of the Ancient Mariner"