The instant the Thunder Dragon lowered its head, Xu Changqing forced out a drop of essence blood from his fingertip. Wrapped in the imprint of his soul, it swiftly flew toward the dragon's head.
Understanding his intent, the Thunder Dragon allowed the essence blood to land upon its forehead.
The moment it touched the dragon scales, it transformed into colorful patterns that spread along the dragon's body, finally condensing into a tiny contract rune and merging into the Thunder Dragon's origin.
This was not a compulsory enslavement contract, but a symbiotic contract. It allowed Xu Changqing to control the Thunder Dragon while also growing alongside the Lightning Spiritual Root.
Just like Lei Yuan, who had a Thunder-Marked Azure Flood Dragon as his companion.
Only, the Lightning Spiritual Root was even more formidable—it directly had a Thunder Dragon as its companion.
The instant the contract was formed, the lightning around the Thunder Dragon surged wildly. Its body then rapidly shrank, eventually turning into a streak of purple light that shot into Xu Changqing's brow like a living creature before merging into his Lightning Spiritual Root and completely concealing itself.
Feeling the dragon's might within his Lightning Spiritual Root, Xu Changqing nodded. "Done."
Having dealt with the Thunder Dragon, he did not leave. Instead, his gaze swept across the entire Shimmering Jade Grotto.
Since he was already here, he might as well explore it. Perhaps there would be other gains.
Using the Spirit-Nourishing Wood Bracelet to amplify his Divine Sense, Xu Changqing carefully searched through the Shimmering Jade Grotto.
The cave's interior was quite vast. Its rock walls were covered in scorch marks left by long-term lightning bombardment, while the air was permeated with violent lightning spiritual energy.
After searching for a while, he sensed energy fluctuations coming from underground.
He moved