Sakura's true element is the Imaginary Element or void. In some way, that can be translated to Shadow too. My innate power seems to be Shadow Manipulation so, both of us shared the same element. Sirin too since I grant her some portion of my power.
No in current time line gods always exist even though we had witnessed the birth of one
According to a hypothesis, the Emperor is the collective reincarnation of all the shamans of Neolithic Humanity's various peoples, the first Human Psykers amidst the unholy reality of the warp. This event occurred before the four immense chaos forces had fully materialised and dates back approximately 8'000 years before the current Era, in what is now known as Turkey.