Dungeon for All, I Summon a Hundred Thousand Ruthless Emperors

Ye Xiao traveled through time, and in this world of universal dungeons, he awakened a unique combat-type professional extraordinary ability - Summoner of All Realms! That moment when monsters invade, strangeness descends, and mysterious attacks occur! Humanity is suffering an unimaginable end! Only the medieval empire still stands, only because of Ye Xiao! Although I am only one person! Like millions of people! Face countless waves of monsters, bone monsters, mechanical skeletons, and mysterious dead souls! Ye Xiao tore open the sky with his bare hands, "We invite the ruthless emperors of all timelines to come and help us!!" The one hundred thousand ruthless emperor has arrived! The world changes color! Astonished forever!