The secret of the Ten-Thousand-Year Yin Soul Tree? [Monthly votes requested]

A fourth-rank mid-grade Yin Spirit Beast King had quietly appeared in the Yin Spirit Deep Forest without attracting any attention.

This Yin Spirit Beast King, Mo Yin, ordinarily seemed content to avoid competing with others, but in practice, Mo Yin acted with extreme caution.

Mo Yin had merely bound a few wandering low-ranked yin spirits and tasked them with keeping watch over the surroundings.

As long as territorial spirit veins were not at stake, neither demonic beasts nor yin spirits generally bothered meddling in others' affairs. Besides, yin spirits spent most of their time asleep.

Meanwhile, a dense succession of thunderous clashes echoed through the secret realm.

"Master, aren't there far too many yin spirits here? And these fourth-rank Yin Spirit Beast Kings all seem mindless, like puppets. Something isn't right."

Among the mountains wreathed in yin energy, fourth-rank Yin Spirit Beast Kings kept appearing eerily, materializing without a sound.

Yet every one of these fourth-rank Yin Spirit Beast Kings was clearly abnormal.

Fourth-rank yin spirits could already take humanoid form, yet every one that appeared remained in beast form. More importantly, their pupils were dilated, devoid of emotion, as though they lacked even the ability to think.

"Be careful and focus on conserving your magical power. They're only a pack of low-level Yin Spirit Beast Kings. Most likely, some special treasure or spirit vein in this secret realm has caused so many unusual Yin Spirit Beast Kings to emerge."

Lin Chang'an feigned a grave expression. As he formed hand seals, sword light flickered around him. This was his first time displaying Sword Dao divine abilities in the Spirit Realm.

He did not dare act recklessly by using the spells and divine abilities familiar to him from the Lower Realm. Instead, he used those he had learned in the Spirit