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.
08-11-2024
wotc
You can't cast Felling Blow unless you choose a creature you control and a creature an opponent controls as targets.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.