Cultivation? I Directly Summon the Skeleton Army!

I, Yang Sheng, have mediocre qualifications. As a loser with five elements and useless spiritual roots, I have almost no hope of building a foundation in this life. Facing the enemy's pursuit, I thought I would just burp, but at the critical moment, I actually awakened the Necromancer Summoner profession. From then on, I could advance by killing monsters and enemies. Not only me, but also my skeletons could advance. Many years later, facing the pursuit of hundreds of monks, I said lightly, "The Army of the Undead is coming!" For a moment, the world became quiet... This book is also called "The Summoner Who Cultivates Immortal World Power". The protagonist will have some different operations. Everyone is welcome to try it!