Quick question:
If your life force is converted into mana and your mana pool grows when you train more, does the reverse also happen, where your life force gets increased and you live a longer life? (I think some other manga also have this premise, where people with lots of mana live (a lot) longer, which actually seems kind of painful to me. Some people outlive their own children, because they have a lot of mana.... The same goes for long lived races, that end up falling in love with humans that live only a fraction as long as them and even if they do have children, they will not live as long as the long lived race. Seems so sad to me...
Anyway, in this case, I hope he at least can heal his mom.