Is the Undead Summoner Weak? My Hundreds of Millions of Dead Troops Are Nothing!

A level 18 typhoon allowed Yang Zhan to travel to the world of job transfer, and awakened the undead summoner, who was recognized as having a fragile body, a small summoning space, and only 12 hours to summon the undead. Fortunately, he gained three golden talents, which made up for the three shortcomings of the Undead Summoner. "You have obtained the only hidden professional skill: Undead Contract, which can consume spiritual power to turn any corpse into your undead." "You have obtained the SSS-level talent: attribute extraction. You can extract an attribute from each undead to permanently bless yourself." "Your summoning space has been upgraded to: the Kingdom of the Undead. You can use it to accommodate an endless army of the undead." Yang Zhan was overjoyed, thinking that with these three talents, his diaosi counterattack would be set sail. But I didn't expect that I had another identity! Qin Wanchong, steward of the demigod family: "Master Yang Zhan, it's been 18 years! Your trial is finally over. Please come back with me to inherit the family's throne and assets!" Yang Zhan: "What! You said that my grandfather is a demigod? And I am actually a second-generation god who was raised in poverty? I don't believe it! Unless you provide evidence..." "Ding, dear customer, your account 666***0986 has received 300 million yuan." ... Many years later, dimensional monsters invaded in full force, and Yang Zhan had ascended to the throne of God. "You contracted a billion undead demon apes and gained all their power!" "You contracted a billion undead demon turtles and obtained all their defenses!" "You contracted a billion undead Lightning Birds and gained their full speed!" "...."