Superconduct

Whenever a creature is affected by a black source, if the last source that affected that creature was blue, this enchantment deals 1 damage to a number of different targets less or equal to your devotion to black. Whenever a creature is affected by a blue source, if the last source that affected that creature was black, this enchantment deals 1 damage to a number of different targets less or equal to your devotion to blue.{/color#ffffff}