Becoming a System and starting a four-way Grail War

In a certain tree. A person who was an ordinary person died and appeared in a new world. Y/N, was the person's name, realized that Y/N had no human form and became the system itself. Realizing that Y/N can connect the worlds from the Tree of Imagery Numbers, Y/N decided to create unpredictable videos that they never expect it to be.
So... let the Holy of the Holy Grail War begin!!!

Disclaimer: I do not own any images, Fate Series, or all from Mihoyo games.