MTL - He’s Not A Non-Entertainment Circle - ~ Related to the work

In a world where Spirit Summoners bond with legendary heroes to save civilization, I awakened as F-Rank—the absolute weakest.While my classmates summoned knights, saints, and mythic champions, my summoning glitched. The circle turned red, and when the smoke cleared, I was staring at the Tyrant Empress—a Calamity-tier villainess who nearly destroyed the world 800 years ago.Everyone calls me cursed. Dangerous. A threat that should be eliminated.They're right to be afraid.Because the Tyrant Empress wasn't the only one who answered my call.And unlike the others, my strength is forged in pleasure.Through forbidden dual cultivation with my villainesses, I grow without end.My name is Cade Marlowe, and I don't summon heroes.I only summon villainesses.

Transmigrated to become a disciple of the demon sect, relying on the technique modifier to become a giant of the demon path.

[Detected the technique “Blood Nerve”, relying on devouring blood to cultivate]

[Side effect: easily affected by the spirit contained in the blood, becoming bloodthirsty, murderous, insane, and even brain dead]

[Please wait, system modification is in progress…]

[Ding! Modification completed and side effects canceled]

In the rebirth, in order to prevent the tragedy of the previous life from happening, Bai Yu decided to rush to the [Tower of God] at any cost, and face everything together with his sister!

However, Bai Yu, who was bound by the system, mutated his bloodline, and transformed into a black-scaled python seems to be developing on a completely different path from his previous life…

- Description from novelbuddy

I never thought I had meaning to my life, but I guess I have a talent too.

「Get ready. The duel will begin soon.」