Training Room: 100,000 Years

Aaron got a talent he thought was useless, "Training room." The talent let him go into a space where he couldn't get exhausted or die, to train until satisfied. Something in the talent broke when he first used it, and he couldn't leave for millenniums. When he finally left, he was closer to a god than any religious being. !! Inspired by webtoons such as "The Druid of Seoul Station" and "Limit Breaker." If you like the concept of becoming overpowered through thousands of years of training only for a short time to pass in the real world these will probably suit your tastes. !!