Noah couldn't cultivate since the world didn't have enough energy to enlarge his dantian, and it also lacked materials that could improve his body. Yet, he could create a superior version of his spherical rune now that his black hole had become stable.
The dark matter was the core material of his Will-consuming runes. His mental energy could work together with the higher energy to create a tool capable of applying pressure to his mind.
Noah felt better after his mind began to enlarge again. Its growth was minimal due to the lack of primary energy in the spherical rune, but that was better than nothing, especially in his current situation.
The training technique was already complete. Noah only needed to reach the Immortal Lands to gain access to the energy that he required.
After that, Noah focused on improving his spells. The process went smoothly due to the Divine Deduction technique, but it differed from what he expected.