Board Thread:Speculation House/@comment-39854843-20190731084207/@comment-36040278-20191202045004

It could also be that Summer was taken by Salem simply to see if the Silver Eyes can destroy her finally, or she wanted to conduct experiments on her, see where their power comes from and if she can use it to improve or modify her Grimm.

A theory could possibly be formed that cinders grimm arm is the end result, since it interacts directly with the magic within the Maidens, which were gifts from the Gods before the world became Remnant, and Silver Eyes channel the God of creations power.