Are Necromancers Weak? Have You Ever Seen a Natural Disaster of the Undead?

[Job change + unlimited summons + undead + fighting is fun + no level pressure + the further you go, the more fun you get] Young boy Xia Tian fainted on the toilet because he pooped too hard. When he opened his eyes again, he had traveled to a world where everyone changed jobs, and awakened an SSS-level professional necromancer. But the Necromancer is the weakest SSS-level profession. Not only does it cost a lot to summon the undead, but it also has a long cooldown. Just when Xia Tian was disheartened, a talent entry suddenly changed him. [Unlimited firepower: All skills have no cooldown! "Hahaha! I have hundreds of people but I can't beat just one of you?" "Young ones! Come on!" Not only that, Xia Tian also discovered that every five levels he would unlock a new skill and talent. [New talent: consumption halved] [New skill: Undead Contract: You can sign a contract with the undead or undead monsters! "Let me call you Lingyi from now on!" "If you don't speak, I'll take it as your acquiescence!" [New skill: Dark Death Dragon: You can summon a death dragon to fight! [New skill: Undead self-destruction: You can control the undead to self-destruct at will! Passerby A: "Damn it! Why can this broken skeleton still explode?" Xia Tian: "Go! Dark Death Dragon, the decision is yours!" What? You ask me why I want to let the dead dragon explode after I have won the battle? …… So handsome!