What Nial didn't know was that Dilan had trained himself in Astral Projection. It had been worth the grueling task and pain as it allowed him to counter exactly the situations they were in right now!
A Wisp of his Soul escaped Dilan's body to see everything around him. Thus, it didn't even require eyes, let alone a head for Dilan to see and process things as he had attained a profound mastery of the Astral Projection technique.
Through his high mastery, Dilan's Soul could do everything his head was capable of.
That was also how Dilan's headless body could move and act effortlessly. Dilan shrouded his Sword in a silverish membrane and he pierced it toward Nial's abdomen.
His attack was rapid and he believed that there was no way for Nial to be able to evade the attack. The distance between the two of them was also negligible!
But just when Dilan expected to see Nial's blood spurt or the blade dig deep inside his opponent's flesh, darkness gushed forth from Nial's abdomen,
'Haven't you both watched enough?' Nial asked his two Devils with a faint smile on his lips as a huge hand emerged from his abdomen. It was as if something was crawling out of him, which was quite literally what was happening. The huge hand absorbed the impact of Dilan's sword thrust and it even destroyed the silverish membrane when the sword cut deeper inside the hand of darkness.
The Tyrant of Destruction hadn't obtained his title without reason. He could handle the Power of Destruction to a certain degree. At least, it was possible for him to destroy the Power of Destruction that had mantled Dilan's Sword.
Nial didn't expect Tyrant to act all of a sudden but it was certainly helpful, especially since he was fighting an opponent that was several times more annoying than the Draco genius, Michael Ignis.
Tyrant's hand shot straight ahead, forcing Dilan to retreat a few meters. Meanwhile, Nial opened the hand he had clenched just a moment before.
Only two currents of Chaos were left swirling around Nial's hand, but that was more than enough for him to get a moment break. Dilan's heart burst open yet again just when he retreated.
The Undying wanted to heal and regrow his head properly but now he had to heal both his head and heart. Yet, that did little to stop Dilan.
'Even that is not enough to forcefully halt his body? What a monster…' Nial thought, finally realizing why the Oracle said that only he could actually lose the mission. As long as Dilan defeated him, Nial's secondary Godly Mission would automatically fail.
Of course, Nial didn't want that to happen but it was pretty obvious that Dilan couldn't be defeated as he just wouldn't die…
When Dilan's heart burst open, Tyrant's arm enlarged and he pulled himself out of Nial's abdomen. On the other hand, Kaeldur emerged from behind Nial, in his human-like form.
Both Tyrant and Kaeldur were shrouded in darkness which Dilan could see clearly once his head had fully regrown and reattached itself perfectly to his neck.
Nial visualized Dilan clearly, trying to sense the changes in the Undying's mana while he was regenerating. He was trying to find a way to counter the cheat-like ability of his ultimate regeneration, or whatever this Origin ability actually was!
Dilan looked at the two Devils and he was just about to act when his head burst open again, once again. Nial didn't even think of giving Dilan the leeway to take a breath or relax. That was not how he would win against the Undying, after all!
With that in mind, Nial ignored the tremendous pain caused by using the Vengeance of Chaos ability as he stabbed into Dilan's chest, slicing apart Dilan's heart as well.
Dilan continued to move backward using his Astral Projection to control his body but both Kaeldur and Tyrant shot forward.
Tyrant charged forward while conjuring a huge mace made out of darkness. Kaeldur, on the other hand, burst to the side.
As for Nial, he adopted a different tactic when he realized that his Chaos-based attacks were entirely useless. It was not necessary to damage himself using Chaos if it was useless, to begin with.
It was more of a disadvantage for him to use the Chaos since it injured him in exchange for merely disrupting Dilan's fighting rhythm. That may be good enough to provide Kaeldur and Tyrant the opportunity to fight against the Undying but the downside was too big.
He had great difficulties enduring the strain after using Chaos so often.
Nial's healing capabilities might be stronger than other beings with the same rank but he was nothing against Dilan's super extraordinary regeneration ability that felt like a cheat.
Not even beings at the Keltia rank were able to survive his Chaos-based attack that had been reinforced with his Essence of Darkness and the crimson moonlight of the Blood Eclipse Moon ability. The Undying was starting to get on his nerves.
"Tear him apart, Tyrant, Kaeldur!" Nial thus shouted loudly while both Devils heed his command without hesitation.
Dilan was supposed to take a moment to regenerate his head and heart, yet, his regeneration accelerated all of a sudden as bits of mana were used up.
His head regrew and a voice filled with anger resounded through the arena of the Colosseum.
"That hurts, you bastard!!"
Nial, however, didn't care about that. He focused on something else as he instructed Kaeldur and Tyrant to distract Dilan for a while.
In exchange, Nial released his dark energy into the ground and he expanded it by absorbing the dense and highly purified mana that could be sensed everywhere.
The dark energy inside the ground of the Colosseum's arena absorbed the mana and expanded itself. Thus, the entire arena was soon enveloped in dark energy. That made things much easier for Nial, especially since Kaeldur's poisonous dark energy seemed to be useless against the Undying.
Dilan was immune to poison and he didn't have much difficulty surviving against the combined forces of Tyrant and Kaeldur either.
Kaeldur was the master of assassinations in Nial's team, but even that turned useless to give Nial an upper hand if he was not able to end Dilan's life or restrict him.
That was also why Tyrant was a much better opponent than Dilan. Using blunt weapons, brute force and precise control of dark energy, the Tyrant of Destruction could fight head-on with the Undying and even overwhelm him often enough.
The only problem was that Dilan didn't seem to get tired even after he fought against Tyrant and Kaeldur for a long time.
On the contrary, the Undying had been able to deal a heavy blow to Kaeldur, cutting off his arm.
It would regrow once the fight was over, but that didn't mean it would be easy for Nial and his Devils to deal with the Undying if his stamina was infinite!
And as if that was not bad enough, Dilan was able to use the weirdest techniques with the use of his Life force. His Life force would be drained in a moment just to shoot through the roof a moment later. It was impossible to tell when Dilan was at his weakest because it looked like he was always weak, yet overly powerful!
'So you want a fight of attrition? We can do that…' Nial thought while slowly assessing his surrounding area with his range of perception and fully unleashed Mana Sense Innate ability.