The so-called "Limit" spell, at its core, drew upon the Source Fire Essence of the surrounding world of flames. Using a special method from the Limitless Flame Sun Art, it arranged the essence into strange, ancient runes, then assembled those runes into a massive one. Once that enormous flame rune took shape, it unleashed an incomparable explosive force.
It looked simple enough, but Source Fire Essence was extraordinarily special. Even at their peaks, the Blazing Demon God and the Grand Prince had found it difficult to mobilize. It could even be said that they only knew of its existence, but had no idea how to use it.
There was also the matter of the small ancient runes and the method of arranging them into a large rune. Answers could only be found in ancient ruins. The Blazing Demon God and the Grand Prince had recognized only a little over twenty of them, while more than a thousand runes remained.
"After this is over, I'll take you somewhere. We might find annotations for some of the runes there," the Grand Prince said with a sigh.
"You know where there are ancient ruins?" the Blazing Demon God asked.
The Grand Prince nodded. "This was originally a secret I intended to trade to an enemy, but it seems I won't need it now."
The Blazing Demon God sent a strand of divine consciousness into Lu Yang's body and said with a smile, "You're one lucky kid. I've taught you the cultivation method for Limit. The Grand Prince and I will go look for treasure, so learn the spell as quickly as you can."
"Alright." Lu Yang glanced around, then leaped into the Red Flame Spirit King's castle. The place had already become a field of ruins, but the Lava Pool at its center