Backfire
{U}
Enchantment -- Aura
Enchant creature
Whenever enchanted creature deals damage to you, ~this~ deals that much damage to that creature's controller.
Binding Agony
{1}{B}
Enchantment -- Aura
Enchant creature
Whenever enchanted creature is dealt damage, ~this~ deals that much damage to that creature's controller.
Repercussion
{1}{R}{R}
Enchantment
Whenever a creature is dealt damage, ~this~ deals that much damage to that creature's controller.