User blog comment:B214/Chapter 504: Rift/@comment-27337151-20161001212600/@comment-7418318-20161001213245

And to top it off, he let Invel live, despite being sure that Invel is directly responsible for Juvia's death with the argument that killing Invel wouldn't bring Juvia back.

But killing Natsu, who's innocent of the crimes, will bring back Silver, his mother and Ur? oO