On that same day, Rean and Roan decided (were forced by Kafan) to try their merge and see what it would be like. Sure enough, they went up one stage in cultivation, reaching the Middle Stage of the Divinity Realm in power even though they hadn't merged any laws yet.
What truly was impressive was that Rion fought Kafan once again to test their merged body power. In the end, Kafan had to concede. The tempering the twins got from Purple Energy was truly game-changing. Their Body was much stronger, their Dantian Energy Pool was bigger than Kafan's in that state, and they could even use some of the Celestial Laws in their bodies to support their moves.
In the end, Kafan reached a conclusion. "I can guarantee. The only ones who can defeat the two of you in this Universe are the Semi-Celestials. And that is only while they are sacrificing their comprehension to increase their power. I didn't hold back just now, and I still came out on the losing side."