Global Killing, Summoning Billions of Skeleton Soldiers at the Beginning

Tens of billions of people from around the world on Blue Star descended into other worlds. People in China, Japan, Lighthouse Country and other countries kill to survive. Xiao Xing, who traveled through time, acquired his only skill [Skeleton Summoning] when he first entered the world of the heavens. An army of hundreds of millions of skeletons appears like a tide in the heavens and other worlds, devouring all enemies. One hundred thousand skeletons to unlock the Skeleton Swordsman. Millions of skeletons, unlock the Skeleton Titan, and devour everything. Thousands of skeletons, unlock the skeleton dragon and suppress all things. There is nothing in the world that a million skeletons cannot solve... If so, add another million!