Summoning Slimes to Become the Weakest Summoner?

This is a world where everyone can change classes.

Monsters and foreign races are on the rise! There are countless secret realms and instances.

Li Tianming awakened two classes:

Slime Summoner!

The unique class, Sage!

Talent Skill 1: When taking damage, consume mana first to absorb it.

Talent Skill 2: When mana reaches zero, every 100 mana points spent on a skill consumes one point of health instead.

Talent Skill 3: All-Seeing Eye.

As long as his mana regeneration is fast enough, he won't lose any health.

"Wait, why can his slimes use skills?!"

"I'm done for! That slime is equipped with a silver weapon!"

Go ahead, hit me! If I lose even a drop of blood, I lose!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.