There had to be a part of Alex inside his clone for his daughter to be born with his talent and blood. If nothing else, the clone had that part of him as the core from which he had formed. So, just as Sunflare had told him, there was a core inside the clone that came from Alex, allowing them to create the Soul Resonance.
There was likely more that went into that resonance, but for now, what Alex had learned was enough.
The older Alex came to the hall some time later, having fully learned two Daos at the same time. His face split into a wide grin as he walked in.
"Congratulations," Alex told him. "It's no small feat to learn two Daos at once."
"Thank you," the older Alex said, slightly embarrassed. "Though something tells me I didn't learn it all on my own."
Alex smiled. "I learned the Dao of Roots thanks to you, so it's only fair that you learn the Dao of Lightning Conduction in exchange."
"Yes," the clone said. "Although, I think I gained more than that."
