After all, the Soul Hall is the foundation of his forces in the Doomsday World.
He let the Soul Hall charge into the battlefield to conquer vast lands and to train his soldiers.
But it wasn't to make the Soul Hall's people seek death.
Directly confronting a Corpse Giant with Foundation Establishment stage strength, even if the Soul Hall could win, it would suffer heavy casualties, ultimately harming Zheng Yi's own interests.
Furthermore, this was a Spirit Communication experiment by Zheng Yi, his endeavor on the path of belief.
The path of belief is vast and boundless, containing countless techniques and abilities, with methods that are bizarre and varied.
