Restoring the Heavenly Palace is a Manga/Manhwa/Manhua in (English/Raw) language, Manhua series, english chapters have been translated and you can read them here.
The Summary is
He Xiu discovered that the Heavenly Palace, which he aspired to be a part of as an immortal, had been abandoned, only the lone phoenix demon god was left with the shattered heavens.. He Xiu wanted to restore the skies to their previous power in order to become an everlasting Saint…. Instead, he acquired the power of the Heavenly Guardian God to possess with intent. So he become the next ruler of Heaven by accident!!?