Lu Ye would not typically activate the Sun Blaze Spirit Runes; when he acquired them, he felt they were a rather peculiar thing. To say they were useless was not entirely true, but to claim they were useful wasn't quite right either.
These spirit runes were only suitable to be activated under certain special circumstances.
Like at this very moment.
Under the influence of the Hefty Weight Spirit Runes, the old man's longsword met Lu Ye's Boulder Mountain Saber, and they were mere inches apart, staring each other down.
What would it feel like to have a sun explode right under one's eyelids?
Lu Ye didn't know, because the moment he activated the spirit runes, he had already closed his eyes.
He was afraid of blinding himself.