Job Transfer for All: I Alone Am a Natural Disaster

[Time travel + lone wolf + undead + universal job transfer + no heroine + no ambiguity] Ye Yan traveled to the era of universal job transfer and awakened the only profession - the Undead Monarch. Obtain SSS level talent - Overture of the Undead! As long as you kill monsters, you can gain energy to split. Various undead creatures become its summons. Ye Yan transformed into the Undead Lord, and with a wave of his hand, an army of undead appeared, leaving no grass growing wherever they went. At this moment, he alone is a natural disaster!