The plan of deifying is a plan to interfere with the collective unconsciousness of all mankind with "Akaxia Sword (thinking elevator)" and two codes, so that the consciousness of all mankind can be integrated into the C world, which is originally a "sea of consciousness". Once the plan is completed, everyone's consciousness will no longer be blocked by body and material (that is, "mask"), and people's hearts will be exposed. The gap between people will be broken, everyone's consciousness can fully understand each other's consciousness, and then the mask will disappear. According to V.V., "If there is a god who makes masks, just kill him." Therefore, the so-called "God Killing Plan" is a plan made by Emperor Charles and others to forcibly remove the "mask" of all mankind (this plan can refer to the "Human Supplementary Plan" in EVA series). But in this case, because all human beings have lost their bodies, they naturally can't interfere with the real world and can only live in their own memories (because Emperor Charles implemented this plan to kill God, it is very likely that all people's consciousness lives in the memories "fabricated" by Emperor Charles). This is why Lu denounced "this will be a static world".
Regarding the fact that Charlemagne was swallowed up by the C world, Lu controlled the collective unconsciousness of the C world with his "complete Geass", and his command was "Don't stop the pace of time!" Because the characteristic of "absolute command Geass" is to complete the order by hook or by crook, the only way to complete it is to erase the participants in the plan to kill God (that is, Emperor Charles and his wife), and the result is that the world of C erases the emperor and his wife. However, it may be because the emperor once held the code and the world of C could not be completely erased, so the emperor's residual thoughts appeared on the resurrected Lu.