The undead summoner is crazy, you actually say that he is weak?

Story Background: This is a world where the game and reality merge, and monsters run rampant. Humans acquire the power to contend with them through job transfer and experience leveling.
Characters and Plot:
Su Ming's Reincarnation: The protagonist, Su Ming, was ridiculed, ostracized, and finally plotted against and killed in his previous life because he transferred to the Necromancer, a profession regarded as useless. However, he was reincarnated back to the day of his job transfer three years ago.
Activating the System: This time, Su Ming still chose to transfer to the Necromancer and activated a super system. With this system, he can gain experience growth every second. While others are still worrying about leveling up, he has already left them far behind.
Displaying Power: Su Ming continuously explores the potential of the Necromancer. He can summon various powerful Boss undead, such as bone dragons, to fight for him. Facing the invasion of hundreds of monsters, he doesn't need to take action himself. With his summons, he can handle it easily, making the world look at the Necromancer profession with new eyes.
Facing Challenges: As his power grows, Su Ming also faces many challenges and troubles. On one hand, he has to deal with the coveting and suppression of other forces. For example, some guilds either try to recruit him or become hostile to him. On the other hand, he also has to continuously improve himself in various dungeons and battles to deal with increasingly powerful monsters and unknown dangers.