Due to the instability of time, if the Immortals from the Immortal Assembly were to travel through it on their own, it is very likely that a time paradox could be triggered, causing the destruction of the associated space-time nearby.
The spells involved here are too complicated, and even the Immortals from the Immortal Assembly are reluctant to attempt them lightly, but they are still covertly preparing to use Spirit Grass to achieve the purpose of knowing the future.
Originally, this plan had the potential to be successful.
They had successfully cultivated "Mother," and Mother's incredibly strong ability to mutate allowed her to gain the power to travel through space-time in the midst of constant mutations, thereby knowing the future.
However, they became too arrogant and gave up all the defenses of their own battleship, using everything to support the Mother here, which then led to tragedy.