Zero fought against Loop, but the dragon proved to be too powerful. Realizing he needs more power, Rei went past his time limit and became a Lost Soul Beast. However, in this form, his combat strength was able to rival Loop.
Rei went past the time limit because he needed more power, or because he was in Loop's clutches and couldn't get out of his armour before the time limit was up, giving us the spectacular transformation and fight seen in Episode 13? 119.74.4.210 15:09, December 8, 2017 (UTC)