Lei Lie actually understood the reason his master was doing this.
The Eastern Domain was in turmoil, and after the battle at Canglan Mountain, the Golden Thunder Sect, Cyan Feather Immortal Sect, and Phecda Sect had all fallen to their lowest point.
The Cyan Feather Immortal Sect was desperate and sought help blindly, angering Zhou Qing and nearly inviting disaster upon their sect, ultimately submitting completely to the Taiqing Sect.
As for the Phecda Sect, there's no need to say more; they've been the lackeys of the Cangyan Daoist Palace from start to finish.
And the Golden Thunder Sect... the two Supreme Elders failed in the refinement of the Nine Nether Lotus Seed, both perished, and the sect's foundations were almost entirely depleted.
Moreover, with the two Supreme Elders' failure to refine the Nine Nether Lotus Seed and their demise, everything forced the Golden Thunder Sect to take a risk.
The "Corpse Sutra" became their only hope.
