The beam that can annihilate even dark gods hit Fenris' flesh copy as it started breaking down into small atoms. The body of the flesh copy started to lose its outer fur first and then the first skin layer. It continued getting reduced until only the skeleton of the copy is deteriorated as well.
[Fenris, the world boss of The Wilde, has been reduced to 10% of his original health.]
Not even ash is left when that beam of concentrated cosmic energy hit the flesh copy. The odd thing is that the deterioration did not stop when the flesh copy got disintegrated. The disintegration was like a virus that spread even towards the soul chain.
The soul chain started disintegrating at a fast rate that even Fenris did not notice. The world boss did not notice of the doom that he is about to face as he just swallowed his pain by finally consuming the soul of the avatar of the dark god.