User blog comment:TGxKing/Canonicity of volume EX/@comment-2603:3020:B0F:6700:45AC:E4DB:8A0E:7488-20180727142451

so many valid points, not to mention according to baka tsuki, ex takes place after vol 14, but it feels more vol 19 due to xenovia wielding both excailbur and durandal, at least that's how i remember it.