Thirteen had a defensive magic treasure with a special attribute. It was an intriguing treasure, capable of blowing enormous bubbles, each of which was a defensive barrier formed from spiritual qi.
Since these bubbles were produced by a Supreme Spirit Artifact, their defensive strength was certainly considerable.
Even so, Thirteen rarely brought it out, for it had a problem that most magic treasures did not.
It burned through spirit stones!
Blowing a single bubble required one superior-grade spirit stone, yet that bubble could only envelop one person!
These were superior-grade spirit stones, after all-something many cultivators might never see in their entire lives.
Some might ask, "The spiritual qi in a hundred thousand Lower-Grade Spirit Stones equals that of one superior-grade spirit stone. Isn't that the same thing?"
Whenever Thirteen heard a cultivator ask this, he usually gave them a look that said, "In your damned dreams."
His magic treasure had only one recess for a spirit stone, so he had no choice but to use superior-grade spirit stones.
Bubbles blown using lower-grade and middle-grade spirit stones were only thumb-sized and fist-sized respectively. Who exactly could a defensive barrier like that protect? Thumbelina?
Of course, some of his brothers often looked at his magic treasure regretfully and said it would be wonderful if it had a hundred thousand recesses...
Whenever that happened, Thirteen would scoff right in their faces. If it had a hundred thousand recesses, then in a life-or-death crisis, the Enforcement Hall disciples would probably have died and gone through several reincarnation cycles by the time he finished loading the spirit stones.
Thus, unless the situation was truly critical, Thirteen really did not want to bring it out.
This time, however, there was clearly no better solution. Su Jiu and Xia Jue had their own methods, but their