Board Thread:Speculation House/@comment-14138255-20160807005311/@comment-28345522-20161013024942

ChishioKunrin wrote:

"Qrow said it only affects Grimm" = Qrow said the only thing it affects is Grimm. The way you worded these two makes them sound exactly the same, just worded differently. Unless you're saying Qrow only mentioned Grimm not that they are the only ones affected, then I understand you.

Also Qrow stated that SEWs were destined warriors and best of the best. Which would imply that when they were still around they had proven themselves in an assortment battles.