Absolute Necromancer

The tower An unknown place with many rapid changes
Ten years later I reincarnated into the body of a boy who lives on Earth in South Korea
The guy who backstabbed me and the one above him Im going to rip into them
The person who reached the top as a necromancer and achieved the class above that Spirit Master Cha Jinhyuk As the AllMaster he will take his revenge by climbing the tower as a necromancer spirit master