2016-09-20 : If either target is an illegal target as Nature's Way resolves, no damage will be dealt.

2016-09-20 : If the creature you don't control is an illegal target as Nature's Way tries to resolve, the creature you control will still gain vigilance and trample.

2016-09-20 : Trample only applies to the assignment of combat damage, not the damage Nature's Way has the creature deal.

2016-09-20 : You can't cast Nature's Way unless you choose both a creature you control and a creature you don't control as targets.