Krenaht:
Understood. In that case, use the Pursuers' Shine Stone to accelerate the Giants' evolution in the area where the Shine Stone Crystal lies.
This is how Giants' Evolution works. The Root of the Lesser Giant and the Essence of the Lesser Giants evolve, becoming a Lesser Giant. They evolve again, and what results is the recovering Lesser Giant.
However, the Lesser Giants do not always evolve into recovering Lesser Giants. Sometimes, the evolution is marred.
While you are accelerating the Giants' evolution, if you come across the Marred Bathus, Marred Carcass, or the Marred Kshana, just slay 50 of them.