All-People Beast Taming: I Can See the Evolution Path.

A global catastrophe has led to the resurgence of spiritual energy. Plants and animals are evolving and mutating wildly, and human technological civilization is suffering a devastating blow.
In their despair, people discovered that they could gain power by contracting with ferocious beasts, and thus the Beast Tamer was born!
(ps: The main character's current tamed beasts are as follows:)
Rock Serpent → Fiery Python → Crimson Flame Flood Dragon → Heaven-Burning World-Destroying Dragon → Chaos Annihilation Dragon
Thunder Sparrow → Thousand-Pound Bird → Swift Thunder Eagle → Nine Heavens Thunder Phoenix → Primordial Ancestral Thunder Phoenix
Golden Tiger → Mysterious Wind Tiger → Geng Metal Tiger → Nine Nether White Tiger → Golden-Eyed Holy Winged Tiger
Crystal Qilin → Origin Qilin → Sky-Slaying Ancestor Qilin
Nine Heavens Black Tortoise → Heavenly Saint Black Tortoise → Black Fiend Emperor Black Tortoise
Gilded Unicorn → Immortal Unicorn