Thread:Ollerus/@comment-5275759-20190420222036/@comment-24758887-20191130012109

The original Japanese text for that part is: お前なんか、かーちゃんのお腹の中にいたんだぞ. かーちゃんが怪力なのは多分あの時のせいだな.

I don't know why, but English fan translation translated 怪力 as shapeshifting. Its meaning is Herculean strength or superhuman strength.