Jack had been able to use mana manipulation to empower some of his skills. He was getting more and more proficient in it. But for his spells, he was mostly still unable to. It was not a problem for basic spells such as Ice Bullet or Electric Bolts. But for advanced and elite spells, it was harder to incorporate mana manipulation into them. The degree of difficulty was higher than his melee skills.
Before this, he had been able to use mana manipulation to change his spell's trajectory. Now, he focused on training to increase the spell's power.
His mana affinity gave him better control over his mana and allowed this feat to be possible. He first tested it using Ice Bullet. The ice ball shot out was significantly larger. No dummy was available inside the Time-space Chamber, though, so he couldn't gauge how much damage his mana manipulation had increased. He would have to run to the Training Ground if he wanted to find out.
