Fate/Extella Link

With the sudden appearance of Karl de Grosse, who possesses the power of the Oracle that can enslave and assimilate all things, the Moon World was about to get dragged into a new war. The Master, Charlemagne, and the other Servants confront the invasion on the principle of the assimilation of all beings. However, those that agree with Karl de Grosse, those that are lending support for not only their own benefit, and even former allies assimilated and stand before Nero and the others as an enemy by the power the Oracle. Furthermore, a young Altera that had gone missing can be seen beside of Karl der Grosse… As various expectations intertwine, a new war is about to begin!