I have an Apocalypse City - Chapter 490 - : Nest

In a modern world where cultivators need a place to cultivate or vent their boredom, there are private businesses that set up instance dungeons with the aid of technology and cultivation magic to enable cultivators to train and commoners to experience the life of cultivation. They are called dungeon suppliers.
Xie Jin's one and only dream was to be a dungeon supplier and when his only relative passed away, the relative's inheritance gave him a plot of land and surprisingly, a 'System' Module which the relative had previously used.
With the help of the system, Xie Jin decided to pursue his dream of becoming the number one dungeon supplier.

A striking man of mysterious origin and peerless talent, he looks back at the world, in all its entirety, with utter disdain. And yet, in the treacherous and unpredictable ultimate formation of the Boundless Secular World, he guards a breathtaking ancient qin with broken strings, waiting silently for the destined one to arrive!

In the shadow of Silver Peak Mountain, the Winter Moon Festival approaches - a party where wolves find their true mates. For 18-year-old Lily Carter, being an omega means living on the edges of pack life, watching others find love while she expects to be paired with another forgotten omega. All her life, she's watched Luna, the Beta's daughter, receive admiration from everyone - especially from the Alpha's triplet boys who will one day lead the pack.But on the night of Lily's 18th birthday, which falls during the festival, her world shatters when her fated mate mark shows - linking her to one of the three powerful brothers. Now Lily must manage jealousy, dangerous pack politics, and her own insecurities as she tries to discover which brother is truly meant for her. As threats emerge from within and outside the pack, Lily discovers hidden strengths that show she's far more than “just an omega.” With three potential mates - the charming diplomat, the fierce warrior, and the thoughtful scholar - Lily's destiny is far greater than anyone could have dreamed.

Brolin, the nine emperor of the Black Dragon Mountain Empire, accidentally obtained the system of the realm of the world, and began the legendary journey of the battles!

In the Naruto world, with his star power, he overwhelmed the shadow-level powerhouses, grabbing reincarnation, and becoming a ten-tailed person!

Fighting the mainland, he led a large group of lords, surrounded the ancient eight clan, and confronted the peak Dou Sheng!

Covering the sky, he broke into the restricted area, seized the emperor’s scriptures and immortal medicine, and called the Lord of the human universe to fight supreme, and the sky was falling apart!

In the eternal life world, he crosses all realms, and fights against the Supreme King of Stone with the attitude of eternal true God!

Immortal continent, he jewels Jiuyang, looks down on immortal ancient, strong sky!

The perfect world, he runs across the sea, suppresses the heavens, and the Zhunxian Emperor must retreat!

Thinking of the eternal world, he ascended to the realm of Supreme Hunyuan, the fifth step of the war, Bai Xiaochun!

Heaven and earth, this is an epic of the black dragon!

- Description from uukanshu