sorrow\'s challenge

: Choose two target blocking creatures controlled by the same opponent. If each of those creatures could block all creatures that the other is blocking, remove both of them from combat. Each one then blocks all creatures the other was blocking. Whenever this land becomes tapped, it deals 2 damage to you and each creature you control.

Whenever a creature is dealt damage, this enchantment deals that much damage to that creature's controller.

, : Tap target artifact, creature, or land.

: Target player gains control of target artifact, creature, or land you control.