Spirit World: Master of the Towers

[Beast-Taming Novel, a slow burn, please be patient!] [Note: This is not a Pokémon fanfiction!] After an accident, Luo Qingxiao is transmigrated to a world full of spirits. He arrives to witness the most terrifying aspect of this world—a spirit siege on a city. Fortunately, the siege seems to have just ended. After much trouble, he finally makes it back to a safe city. This is a world where humans and spirits live together. Spirits are the true darlings of the world, possessing incredible powers. Countless spirits like the Frost Bird, the Blazing Sun Flower Spirit, the Thunder God, the Fighting Emperor Dragon, etc. live in this world. Humans were once only able to eke out a living until the emergence of the True Spirit Contract changed everything. This contract allows humans and spirits to form a miraculous bond: the spirits grow stronger with the help of humans, and the humans command the spirits in battle. Now, humans have occupied most of the world's territories. After living in this world for nine years, Luo Qingxiao finally embarks on his journey to become the strongest trainer.