2017-11-17

If the target artifact or enchantment is an illegal target when Nature’s Claim tries to resolve, the entire spell doesn’t resolve. No one gains any life.

2021-03-19

If the target artifact or enchantment is an illegal target by the time Nature's Claim tries to resolve, the spell doesn't resolve. No player gains 4 life. If the target is legal but not destroyed (most likely because it has indestructible), its controller does gain 4 life.