This is Supposed to Be a Summoner, But What the Heck is This Darkin Blade?

[LOL Elementalism + Superpowers + Unstoppable Push + Invincible Leveling Up]

The void has invaded, strange beasts roam freely, and the extraterrestrial demons are eyeing us covetously.

To withstand these multiple crises, humanity was forced to unlock its genetic potential, giving everyone the opportunity to awaken superpowers at the age of 18.

Lu Chen transmigrated here and comprehended the Summoning Technique during the awakening ceremony in his senior year of high school, and also obtained the S-rank passive skill—Soul Contract!

Unlike other summoners whose physical bodies are weak, Lu Chen can obtain all the abilities and attributes of his summoned creatures.

only...

His summoned creature seems to be slightly different!

Everyone else is a tree demon, an undead, a monster, or a goblin.

And what about Lu Chen?

A grumpy Darkin wielding a greatsword!

A foul-mouthed Yordle riding a lizard!

E, the fearless orphan swordsman who rides the wind!

The ninja lightning squirrel has lived for nearly ten thousand years!

Even the Star Forger Aurelion Sol, who can create planets by hand and rule the universe, is a summoned creature of Lu Chen!

etc,

Why is there a succubus here??

This book is also known as "Starting with a Darkin Greatsword, You Call This a Summoner?"