Mysterious Awakening - Chapter 17: The Terrifying Phone Call

His mother kidnapped by the Ice God Pagoda at a young age, Nian Bing grew up travelling with his father, avoiding pursuit. One fateful day, he was forever separated from both his parents and inherited two immortal treasures from them, the Ice and Snow Goddess’ Stone and the Flame God’s stone, allowing him to use ice and fire magic in harmony, a feat unheard of. Taken in by a former chef of legends, once known as the Demon Chef, he creates legendary cuisine while walking the path of vengeance!

- Description from Novelupdates

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.

A soul from the Earth transmigrated and was reborn as a newly hatched little black dragon.Bad news: His dragon mother has been targeted by a human kingdom, which has already dispatched a massive dragon-slaying army.Good news: He awakened a Talent:[Feast]: Converts all devoured matter into bodily growth, permanently increasing physical strength and overall size.When ten stacks, a hundred stacks, ten thousand stacks, and even a hundred thousand stacks of [Feast] are accumulated… a terrifying black dragon that feeds on stars and entire planes of existence is born.Udi: “I'm gonna f*cking EAT, EAT, EAT!”

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.