I Can Summon Billions Of Demons

*In this Isekai world, In ancient times there were three thousand Great Daos, countless living creatures, and many different types of creatures.
The spiritual energy had brith all kinds of living beings. 
Even though each one of them all could cultivate. but also it had been used in different way by their own desires.
In “good” way, them were called the spiritual creatures.
In “Evil” way, them were called the Demon creatures.
They had fought to each other for countless years, Until one day, a Powerful being governed the world and refined it with heavenly stones. 
It made a plate and sealed almost all demons into it，and named it -The Demon Sealer!
…
After Billions of years later. This world now called the Profound Star Continent.
The levels of martial arts in this world were very strict.
There were seven major stages.
Each named the Star Personage, Star Master, Star General, Star Emperor and Star Sovereign. Star God and Star Saint. 
Only the Star Personage were divided into seven small stars. 
Above the Star Master, there were only three levels.
….
As the top elite from the Alien Group which specialized in handling special matters.
An accident had made him travel to another world with a mysterious treasure and possessed a young master’s body of Great Luo family.
Due to his poor cultivation talent, he was only sixteen years old this year. 
He was still an ordinary person who did not even have the strength to truss a chicken.
The other children who were as old as him were all around the fifth star of the Star realm, and even those who had extraordinary talent had reached the Star Master.
But luckily he had the mysterious treasure!
“My successor, There are hundreds of millions of demons inside this artifact. Remember not to summon them easily, even though you are the next Lord of Demon Sealers. "
“Demons are the most bewitching of all spirits. Those whose will is not firm, remember to use this item. Also, remember not to travel with demons!”
Now with this power and The identity of the previous owner，What is he going to do？
Could him control the Demon Sealer without losing his own mind？