Before starting his dual cultivation, Qingyi needed two things.
The first and most obvious: a dual cultivation manual.
The second, something that wasn't exactly necessary, but which he still wanted to try: mortal-level spirit roots.
Honestly, his high-level spirit roots were already enough for him to cultivate to transcendence without any problems, but he still wanted to test the level above.
That's why, upon arriving in Ruxue's world of mind, he immediately locked himself in a cultivation room, opening his status screen and clicking to improve his spirit root.
Intense pain immediately seized his body as everything was destroyed, from his meridians to his dantian.
Every pore used to absorb Qi was brutally broken and then expanded so that it could absorb as much energy as possible.
After many minutes, this pain finally ceased.
[Spiritual root improved! High-level lightning sword spirit root -> mortal-level lightning sword spirit root].
The difference was immediate.
