Conjuro
Pon un contador +1/+1 sobre la criatura objetivo que controlas. Luego, esa criatura hace una cantidad de daño igual a su fuerza a la criatura objetivo que controla un oponente.
As Felling Blow tries to resolve, if either creature is an illegal target, the creature you control won't deal damage. If the creature you control is a legal target but the other creature isn't, your creature will still get a +1/+1 counter.
You can't cast Felling Blow unless you choose a creature you control and a creature an opponent controls as targets.