Grey Knight Strike

Choose one or more—
•Destroy target artifact, Lose life equal to Mana
Value of the target.
•Destroy target creature, Lose life equal to
Mana Value of the target.
•Destroy target enchantment, Lose life equal
to Mana Value of the target.
{bull}Destroy target planeswalker, Lose life equal to
Mana Value of the target.