The mental coma ended once Noah's mind started to produce thoughts again. Still, the event didn't make him start another project right away. His mind was full of understanding of time, and he needed a bit to absorb it.
The sudden burst of power obtained when the ethereal blackness empowered the mind made Noah go through an entire quarter of the time sphere. That almost brought the amount absorbed on par with the space sphere.
The absorption of the time sphere had lagged behind the others since the beginning of his training with them. Yet, the sudden power-up had allowed him to almost catch up with his second last. Noah still needed to let his mind fully comprehend and transform that understanding into something that suited his existence, but he believed that the process wouldn't take much.