
: 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.
The first ability can target any two blocking creatures a single opponent controls. Whether those creatures could block all creatures the other is blocking isn’t determined until the ability resolves.