They were only temporarily controlled insects anyway; Huo Hai had never intended to control these Flame-Eating Insects permanently. Their innate talent was formidable, but their adaptability was far from comprehensive, and their potential was limited.
Huo Hai knew that he had only a limited number of Heavenly Grade Source Spirit Stones, so he had never considered cultivating every Spirit Insect. Besides, he had already used up more than half of the Heavenly Grade Source Spirit Stones in his possession. Only a scant few remained in his hand now.
"Go. Start devouring the flames." At Huo Hai's command, the Flame-Eating Insects immediately opened their mouths wide. The power of flame around the Lava Abyss rapidly gathered, then was swallowed by the Flame-Eating Insects. Before long, Huo Hai sensed a stream of flame power feeding back into his body. After testing it, he found that this flame power could directly temper his spirit power without conversion.
After merely trying it out, Huo Hai guided that power into his Fire Seed to raise its grade. It was not that Huo Hai did not need the flame power to temper himself, but rather that his spirit power had already reached its utmost limit.
Before leaving Cinnabar Glow Mountain, Huo Hai's spirit power had already been close to its limit. After several great battles, his spirit power had finally reached its limit once more. He simply had not had the time to advance earlier because he had been traveling.
Now that he finally had free time, Huo Hai naturally would not let it slip away. He inspected his Inner Space and found that the Star Gu injured during the battle against the Blood Curse King had already recovered more than half their strength. Reassured, Huo Hai released several Star Gu to stand guard around him.