Demon Lord's Reincarnation

When Khalos finally admitted to himself that he could actually die from this battle his anger simply grew. Khalos wanted nothing more than to destroy Ren's very being but no matter what he did he could not end his opponent. Ren was beyond what he expected, he had come here thinking that Ren was nothing more than prey, but it turns out instead of him being the predator it would seem that he was the prey. 

"DAMNT IT, DAMNT IT, DAMN IT ALL!!! I DON'T CARE ANYMORE I'LL DESTROY EVERYTHING, I'LL DESTROY THIS WORLD AND YOU IN IT!!!" 

Khalos raised his arms into the sky as his mana raged forming a ball of all the different elements combined. Ren who was smiling from ear to ear did not interrupt Khalos from gathering so much mana, as he wanted to see the full extent of this powerful attack. So in preparation, he too gathered his mana and Spirit Aura into his scythe. 

The two sides were gathering the largest amount of mana they have ever shown in this entire battle. The very weather was going crazy by the sheer force of their mana. The islands near them were being destroyed, the ocean was splitting, the volcanoes were erupting, and the clouds were raging. 

The current energy they have gathered for this one attack could destroy the world they were standing in ten times over. Khalos tossed his attack towards Ren, the beam that was the combination of all the elements came crashing towards Ren. 

In response to the raging elements that were coming down on him, Ren laughed in glee as he slashed the death scythe upwards. The two attacks collided creating a distortion in space that even affected those that were hundreds of miles away from them. The entire world shook from the collision and it felt like the world was going to end. 

After a few seconds, one of the attacks was dispersed and the other continued towards its target. Ren was hit by a portion of the remaining energy of Khalos's attack. Ren's mana barrier was unable to stop the attack as it hit him. Seeing that he was able to hit Ren with his full-powered attack Khalos thought that he had won since even if Ren was able to somehow survive the attack he would be gravely injured. 

As Khalos tried to see if Ren had died from that attack he suddenly heard a hearty laugh and at that moment an overwhelming aura came assailing him. 

"HAHAHAHA!!! WONDERFUL! THIS IS TRULY WONDERFUL! NOW, THIS IS A TRUE BATTLE! COME ON O' NEW GOD, SHOW ALL YOUR MIGHT AND RESOLVE! COME AND SHOW ME THE STRENGTH THAT CAN SHATTER MY VERY SOUL!!!"

Ren appeared before Khalos relatively unharmed from that attack. When Khalos saw Ren he was shocked. Among all the possibilities that he thought of this wasn't one of them. Despair was slowly kicking in as Khalos wildly threw spell after spell against Ren who either dodged or countered. As the damage Khalos received slowly accumulated the fear he was holding back took a tight grip on him. It was at that moment as his despair has sunk into his very soul and the fear had shattered his resolve, he heard a voice. 

"Do you wish for unrivaled power, enough power to destroy all your enemies?" The voice echoed in Khalos's ears. There was madness in the voice that felt dangerous but Khalos did not care, all he wanted right now was to gain power, enough power to lay waste to the enemy before him, so he did not hesitate to agree. 

...

Ren stopped attacking Khalos as he noticed something weird happening to his opponent. Ren felt an ominous aura coming from Khalos, and he had sensed this aura before. 

'Is this a seed of the ORIGIN?' 

After Ren asked this question he heard the original incarnations voice answer him. 

'No that's something stronger than a seed, that's a branch of the ORIGIN. Once he assimilates with that thing his power would rise to an extreme level that this world won't be able to handle. You need to forcefully bring him to the higher planes, now!'

When Ren heard what the original incarnation said he immediately took action and charged towards Khalos. As he got near Khalos's body Ren could feel the intensity of the other party's aura, he then sent a telepathic message to Silika. 

'I'll be going to the higher planes first, you guys follow once things settle down.' Before Silika could respond the link was lost. The power Khalos was emitting was disrupting the mental link between him and Silika. 

Ren also noticed there were actual cracks in the space near Khalos, and they were expanding at a fast pace. Ren no longer had time to go through the usual route in ascending he needed to use a spatial spell and forcefully teleport him and Khalos to the higher planes. 

Ren grabbed hold of Khalos as he was still in a passive state. The moment Ren's hand touched Khalos he felt a powerful force pushing him away, but Ren did not back down and tightly hold onto Khalos. Before Khalos could react Ren had already used a spatial spell to teleport him and Khalos to the upper planes. 

...

The spell took effect almost instantly, Ren and Khalos were now in an unknown desert area were no living thing could be seen in miles. Ren was then flung away by Khalos who had a dark aura surrounding him. There was no longer any sense of clarity in Khalos's eyes as he roared. 

Ren was not able to react as he suddenly felt something had hit his abdomen. Ren was blown away, and before he could stabilize himself another attack had hit him in the same spot. Ren was still unable to see or sense Khalos's movements but he knew that he was responsible for the attacks. Ren raised his arms to defend himself from another attack to his abdomen but this time the attack came from above as he was smashed into the sand below. 

The attacks were so powerful that each punch was equivalent to the strongest attack Khalos used but moments ago. This was Khalos's full might just a while ago, but now it was just his normal punch. If Ren wasn't wearing the blood robe that shielded him from the attacks, he would've been gravely injured.

Ren stomped on the ground inserting his mana into the sand. The sand infused with his mana surrounded him and created layers upon layers of walls. This infused sand was almost as durable as the scales of a dragon, this gave him time to catch his breath. 

Ren could hear the sound of Khalos pounding at his defensive sand walls. Each strike Khalos made destroyed a layer and it was just a matter of time before he would destroy all the sand walls. In his current state, Ren was unable to keep up with Khalos's speed, and the same as the last time he fought someone with a similar aura mana sensing could not work.. This was a very desperate situation and if it was anyone else they would've started to panic, but not Ren, instead of panicking he was even more ecstatic than ever before, now that Khalos had powered up.