Learning.

Valerian was fighting with the phantom of the old man without the concept of time, he has been trying to win this battle for the past ten days without a stop. However, the more desperate he became the worst he lost. In the past ten days, he lost count of how many battles he has lost. How many times this phantom has trampled over him, he did not know anymore. 

However, during this process, he learned how to stay calm and never give up. He learned how to channel his skills even better. The battle style where he could use mana and battle aura together evolved significantly as well. The only thing that shadowed his gains was the miserable defeats every time.