Evan was in his training room right now, looking at the potion that Aya gave to him in his hand. To be honest, Evan was not entirely sure about this thing. Because he had never heard of any potion that could increase his own mana pool with only such little cost.
If there was such a good thing, wouldn't everyone want to get it?
He had activated the sound proof formation in his training room. As the future patriarch of the White Family, Evan was given a lot of resources, including a private training room and all. It was clear that his family members were very concerned about his situation and hoped that he could train well for the sake of the family.
A private training room was nothing.
As for the sound proofing formation, it was made so that his training would not disturb other people in the White Family. In this way, even if he were to use some magic spells that were noisy, no one would come to disturb him.