I, the heroic substitute, was exposed

In all eras, with the help of the system, Bei Mu is always the most dazzling one.
Once became King Arthur, and trained Mordred to become a new generation of kings.
Become Joan of Arc and burn all traitors.
In the absolute Warcraft front, as the King of Heroes, he defeated Tiamat alone.
When all the dust settles, he can finally return to his original world.
……
But the world he once lived in has changed.
In the once peaceful world, a large number of heroic spirits appeared.
He thought he would be able to live in peace.
Unexpectedly, the old system suddenly exposed what he did.
With the exposure, his strength is gradually recovering.
But those heroic spirits who once followed him also appeared one by one in this era.