Xiao Yu had spent three and a half years forging the Golden Bamboo Divine Thunder Swords, from refining the forging method and gathering materials to finally completing them.
Over that long stretch of time, his cultivation had long since stabilized.
Now that his magic treasures were complete, it was time to consider the next step in his cultivation.
For Xiao Yu as he was now, medicinal pills refined from Level Five Demon Cores no longer had much effect. To advance his cultivation, he needed level six or seven demon cores, which meant heading out to sea to hunt for them.
Before setting out, however, Xiao Yu felt he needed to strengthen himself further to be safe.
With his current strength, he had nothing to fear from Core Formation cultivators. But what if he encountered a Nascent Soul cultivator or demon beast? Though the chance was slim, he could not rule it out. He would certainly be no match for one, and even whether he could escape was a huge question mark.
He therefore had to prepare. The techniques he possessed that could help were Bloodshadow Escape, the Formation-Origin Sword Union Art, Sword Light into Sword Aura, and Sword into Threads.
Of these four secret arts, Bloodshadow Escape and the Formation-Origin Sword Union Art could immediately provide powerful results.
The sharper the magic treasure, the greater the power of Sword Light into Sword Aura. Learning it would give him considerable help in battles against Core Formation cultivators, but it would not be enough to withstand a Nascent Soul-level existence, probably not even for a moment.
Sword into Threads, meanwhile, required a powerful flying sword magic treasure to support it. His magic treasures had only just been forged, so he could not use it at all yet.
He would therefore learn Bloodshadow