A power amplification of level 10 means that the flying artifact can act as a level 10 spell and produce power that will be equal to 10 multiplied by the quality of his internal energy.
So a level 10 flying spell would be able to do what the top grade flying artifact can. But the flying spell won't be as efficient and won't be able to replace the energy source with energy stones.
The flying board satisfied him, but he still asked about flying ships. He wanted to know if he could get those.
Unfortunately, he couldn't. He was told that flying ships are at least rank 3. It is because even the smallest ones require a vast amount of energy to operate, which rank 2 cultivators cannot supply with their internal energy or control with their weak minds.
He was a little disappointed to hear that, but he was satisfied with his flying board, so he left the weapon forging hall happy.
He didn't want to get tempted by the space pouch, so he left the weapon forging hall as fast as possible.
