Lu Yang summed it up. Something like the Earth Demon Sword could only be used at a life-or-death moment, when he had to risk everything in one final gamble. At all other times, he still had to rely on normal spells against enemies, but the Blazing Demon God had no better spells to teach him.
Fire Soul Slash was already a lower god-level spell. In the Blazing Demon God's words, when he had been at Lu Yang's stage back then, he had not possessed even a fraction of Lu Yang's terrifying strength.
At the Lord Tier, Lu Yang had seized a God King Tier body of a Blazing Demon God perfectly suited to him in Blood Purgatory, a place where lower gods walked everywhere and main gods were as common as dogs. After merging with it, his flame magic power was nearly a hundred times greater than that of demigods at the same tier.
When the Blazing Demon God had been at Lu Yang's stage, he could only unleash Fire Soul Slash twelve times. Lu Yang, however, could use it over a thousand times without issue. Yet having more magic power did not mean he could cast mid-level god spells. The gap in tiers was too great, as was the difference in flame temperature. They were simply not on the same level as mid-level god spells.
Ancient god spells were different. After studying the Ancient God Three Styles, Lu Yang felt that God Annihilation Strike, Great Nirvana Art, and Doomsday Mindfire were all law-based spells, just as the Blazing Demon God had said.
God Annihilation Strike primarily relied on the explosive force of flames, similar to converting thermal energy into kinetic energy. It fired a powerful Flame Impact ray that pierced through a single point on the target, much like