MTL - Necromancers Are Frantically Stationing Troops In the Apocalypse

[The false necromancer has insufficient soldiers and is being ostracized and hunted. ][The real necromancer, countless skeletons, become the overlord of one party. ]After Wu Heng obtained the double portal, he discovered that the original world was full of zombies.When a gangster's plan fails, another plan to survive begins.Wu Heng chose to become a Necromancer'.Is it not allowed to summon the undead from another world? In the last days, the entire planet is a source of soldiers.Can't survive in the zombie world? Then I will live in another world and learn skills.From then on, an undead army equipped with modern weapons appeared in the world.Natural disaster strikes, millions of skeletons.Immortal Bone Dragon, King of the Undead.(Double portal + necromancer + magic + fantasy world + undead natural disaster.) - Description from Novelable