When I died, All the Empresses Cried

When the infamous Emperor of the Demons came back from the dead, the whole Universe waged war against him.
It seemed impossible to win until the famed empresses of the Universe arrived at the scene, only to lose once again.
While everyone was despairing over their bleak future, a handsome youth suddenly appeared out of the crowd and killed the Demon Emperor by sacrificing his life.
As cultivators from the myriad races stood still and watched the nameless hero fall, a scene on the void, a scene depicting the past lives and numerous merits of the youth.
One by one, from Ice Empress to the Fiery Phoniex Empress, all of them started to cry as they saw their pasts!
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Every time Li Yao died, he would reincarnate into a better body, he never knew how or why did this happen as he simply chose accept his gift. Even though he couldn't remember his past lives, knowing that he was a reincarnator strangely comforted him.

In his first life, he became the Demon Slaughtering Emperor who died as he protected his junior sister,

Second life, he became a saint that protected the masses and doted on his sister, but he was killed when he was fending off traitors after leaving his final words ''Don't worry about your brother, take care of yourself.''

Third life, fourth life, fifth life...
In his final reincarnation, his junior sisters all became Empresses themselves...

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This is my first time writing a novel like this, you know, the ''watching'' or ''live broadcast'' genre. I've only seen it on some fanfics before (MCU cast watching MCU, Naruto World watching Naruto etc.) so I started writing it on the cultivation genre, thinking it would be rather unique for this genre.