/Author note- writing quality won't be that good these first few chapters, but it is what it is. Also, I've read stuff like Maō Gakuin no Futekigōsha, and many more. There will be elements from that, but this will branch off into its own story./
The Continent of Demons, Daemon, Demon Capital, Ankronchia, Year 12001.
The promised day. The weather was unpredictable, lightning strong enough to destroy a rock struck down at anything in sight, winds strong enough to cut a castle into millions of pieces struck anything in its path, earthquakes so strong that they shook the heavens and reverberated around the world, and rain that felt like you got hit by a bullet and left a sensation of acid permeating your skin right to the very bones.
This was happening all around the world, but what was weird was none of this affected the demons or even struck anywhere near them, but the world understood why this was happening and it left them with a deep sense of fear and trepidation while the demons were on their knees praying and crying with tears of joy.
When the Demon King was slain by the 7 heroes, It was said that that he would reincarnate 2000 years later on this exact day. The demons were ecstatic. Their lord, the strongest being in the universe who slew gods with a swipe of his blade, and destroyed heroes without even allowing them to move!
The universe was his playground and the people in it were his servants, no one could oppose him. Even though he was a tyrant he was fair, anyone who bowed down to him was given their freedom. He let the races keep their kingdoms and territory he let the Gods keep their authority even tho he did strip the title 'Gods' away from them.
But he still died, in the end, the 'Gods' used a forbidden technique that sacrificed, Gods, humans, Monsters, Elves, and other Demi-humans from other planets, resulting in a couple trillion deaths and converted their life force into strength dividing it amongst the 7 heroes giving them the power to slay the feared and 'Invincible' Demon King. But the power of the forbidden technique would kill you within a month after receiving the power.
The Demon King knowing his demise was imminent had used his own spell that would allow him and anyone close to him to reincarnate given enough power was generated during their last moments. And this was the time for him and the heroes to reincarnate.
...
In a faraway place in the Human continent, Alverion, 7 people were on an island far up in the sky you couldn't see it without Blessed or Demonic eyes. They were seated around a table with an 8th person with a cloak on sitting at the frontmost seat giving off a Divine feeling that felt like you were at the happiest point in your life.
"What are we going to do?!" A short 3ft Demi-human, apparently a dwarf with a red long beard and fierce eyes yelled.
"Calm down Duristren." A long-eared beautiful Demi-human tried to calm down the old grouchy dwarf.
"Calm down? You want me to calm down?! That damned monster is coming back, Alvora! What are we going to do?!
"What do you mean?" The beautiful elf called Alvora had a surprised expression on her face. "When he comes back we'll welcome him. After all, our Ancestors are going to be back too, this is going to be a joyous occasion! The 7 heroes!" Her whole body was oozing reverence for their Ancestors, the great 7 heroes.
The other 7 people just nodded at this, but you could sense the reverence they have for their ancestor, but their joy was quickly splashed with cold water when they heard what the dwarf had to say next.
"Idiots..." The Duristren muttered under his breath. "Did you not stop to think he might come back the same way he was before?!" The others shuttered at this even the hooded figure could be seen visibly shaken.