The Ghost Master recognized the Sword Fusion Technique of Carefree Child and his companion at a glance, and nodded in satisfaction. The power of this sword was indeed enough to make the Ghost Master retreat.
The Sword Fusion Technique had extremely high requirements for sword cultivators. Not only did it require both people to be in the same Sword Dao Realm, at least at the simplification stage, but it also required an extremely high level of mutual understanding.
This kind of tacit understanding couldn't be cultivated in just a day or two; it required long-term tempering to achieve a mind-to-mind connection.
However, the Ghost Master still had no intention of retreating. Although he knew this sword was unstoppable, he still wanted to give it a try. After all, he couldn't even remember the last time he was injured.
"Underworld Prison!"
