The severed branches, from a temporal perspective, were not supposed to exist; hence, once it became a fact that "the branches had been severed," time would automatically correct itself and completely erase that future segment of the branch.
Duanmu Huai once told Ann a story about how to eat fruit from thirty thousand years later, which conveyed a similar idea. He wanted to eat a fruit, but this fruit took ten thousand years to germinate, another ten thousand to blossom, and another ten thousand to bear fruit. Not wanting to wait, Duanmu Huai found the best method was to go back thirty thousand years, plant the seed, and then return directly to thirty thousand years later to eat the fruit... His God of Destruction Level had increased to twenty because he and Kiriman had created the Grey Knight back in the 30K.
