Does Unyielding Spirit stop damage from fight spells like Challenge and Carnivorous Snapvine's ability?

Question

Accepted Answer

Ruling: No, Unyielding Spirit does not stop damage from Challenge or Carnivorous Snapvine.

Nuances:

Unyielding Spirit does stop damage from Void Seeker, Stormbringer, and Yasuo, Remorseless
Unyielding Spirit does not stop damage from Challenge, Last Breath, or Carnivorous Snapvine