The pressure on Aksai's soul never truly left him even after 5 years of patiently cultivating.
Even after all these years, it sat there like a heavy stone tied to his spirit. He could endure it, but he knew it was not something he should keep carrying forever if there was a better way.
Thankfully, Aksai had Nuri to rely on. He constantly made use of her to analyze data and his current situation to come up with better ways to tackle his problems. He made right use of her computational capabilities and re-learned all the soul-related techniques.
He forgot about time and the outside world, transforming into a kind of mad scientist who uses every bit of his time to run various tests. He also made his woodland clone capture various demon beasts and undead poison creatures to run experiments on them every once in a while.
