After doing some experiments, Billy confirmed that he could control the mana inside those objects since they were originally his mana. Like, he could make a spear sharper or a ring more durable, but it only worked for a time since the mana would be used over time. Still, that didn't grant him the skills that he wanted. The question was: how he could make that into a skill that could heal wounds or cure diseases.
"If only I could control my mana better…" Billy thought.