User blog comment:Omega natsu2/Episode 185: Erza vs. Kagura, Review./@comment-1359322-20140610111534/@comment-5303512-20140611043345

I remembered in the anime for Bleach, Nel cut along Nnoitra's chest and after word that wound is nowhere to be found.

Maybe it's a animator mistake or it's on purpose to limit the explicit gore. Like in Bleach, they never cut off Uryu's hand.