User blog comment:Omega natsu2/Fairy Tail Episode 213: Erza vs. Sagittarius: Horseback Showdown!, Review./@comment-2214433-20141220103631/@comment-7418318-20141220135805

They did use a remix in one of the previous episodes that added male voices to the choir if I remember correctly, but this one really sounds like the original Akuma Deliora to me.