After arranging Fan Lan, Qi Wu, and the others within the World Rift, Zhang Yu left and returned to Kaiyang Academy.
Although quite a few Iga people still remained within the World Rift, he did not believe they could pose any threat to Fan, Qi, and the others.
All the Iga Gods and Cavern People had been blasted to extinction by mystic weapons in the chaotic battle that day. What remained were merely some divine descendants.
The abilities of divine descendants had their limits. At most, they could contend with cultivators who had read the second chapter, and with Fan Lan and Qi Wu's strength, they could handle them with ease.
After returning smoothly to Kaiyang Academy, he entered his study, brought paper and brush before him, pondered briefly, and then began to write.
These past few days, he had been considering how to resolve the unfamiliar seal on the second layer of the visualization diagram.
Though it was called a seal, it actually required him to master an ability he himself had originally lacked. Once he accomplished that, he could connect with the other seals and complete the second layer of the visualization diagram.
This ability was rather special. It required him to perceive "interlayers."
So-called interlayers were the cracks of this world. It was said that they had arisen after the world merged with the outer layers. They were everywhere; some existed permanently, while others drifted and shifted unpredictably.
Permanent interlayers had fixed entrances. The World Rift and divine kingdoms were both examples, though neither was an interlayer itself—they merely made use of interlayers and fused with them.
Such places were also easier for those possessing a certain degree of supernatural power to find.
The shifting interlayers, however, were much harder to locate. Like foam in boiling water,