On the Night of Clan Annihilation, I, the Great Emperor, Was Summoned by My Descendants

[The Great Emperor + Invincible + Cool Writing + Sweeping Sweep + Decisive Killing] One hundred thousand years ago, foreign invaders came, leaving thousands of miles of land devastated and all the people in the world suffering! In order to protect the people of the world, Emperor Lu Xuan went into the abyss alone, using himself as a medium to suppress the entrance to the foreign land! But he didn't expect that one hundred thousand years later, he would suddenly receive a call from his descendants' bloodline! "Grandfather, are you still alive?" "If you don't return soon, the Lu family will...die out!" … On this day, the Heaven Burial Sword, which had been sealed for a hundred thousand years, was reborn. The sky wept blood and myriad swords wailed in grief! "I am just old, not dead!" "A bunch of ungrateful people, how can they be worthy of my protection!" Deep in the abyss, Lu Xuan was furious, and his cold voice spread throughout the heavens! "I have guarded the Abyss for a hundred thousand years for the sake of the heavens. How dare you ants insult my descendants and sever my legacy!" "In that case, let's drag the heavens down with us to be buried together!" On this day, the seal of Tianyuan was lifted, the foreign land came again, and the heavens fell!