All seven Lostbelts have been excised, yet the Earth remains bleached. Chaldea is heading back to their home base in the South Pole to investigate Daybit's claims that the Foreign World CHALDEAS is the true cause of the Human Order Revision when they come across a massive barrier covering Antarctica. Due to Chaldea making constant use of things not of the Human Order such as the Servant Extra Classes, they are barred from approaching CHALDEAS which has become the Foundation of the Human Order after the destruction of the Lostbelts. Chaldea must once again travel the bleached Earth and clear their debt to the Human Order in the Ordeal Call before they can confront the mastermind in Antarctica.
- Breather Episode: There are no fights or even multiple sections in this chapter, just a single node to calm down from the madness of the last Lostbelt.
- Didn't See That Coming: A wall of pure Human Order preventing the defenders of the Human Order from solving the problem was not something anyone expected. Even "Romani Archaman", who declared himself Chaldea's enemy, is so baffled by this turn of events that he actually tells Chaldea how to fix it.
- Company Cross References: Goredolf mentions that there's an old family who practices Substitution Magecraft separate from the Clock Tower, a reference to the Ainsworths from Fate/kaleid liner PRISMA☆ILLYA.
- Foreshadowing: When "Romani" explains the details of the Ordeal Call, he initially says there will be four trials, but pulls a Verbal Backspace and instead says there will be three. Hm...
- Gameplay and Story Integration: Even discounting Events and Main Interludes that occurred in Part 2, the protagonists have had to interact and work alongside Extra Class Servants in the main story, including Qin Shi Huang Di (Ruler), Ganesha (Moon Cancer), and Oberon Vortigern (Pretender) to name a few, and that doesn't even cover antagonists of this subset like Ashiya Douman (Alter Ego) or Sherlock Holmes (Ruler) and Edmond Dantès (Avenger) who have been with them since Part 1.
- Infodump: The entire chapter is a 20 minute long exposition session explaining many of the mysteries encountered throughout the entire game, particularly about Subject E and the Traum Singularity.
- Plot Hole: The context for the Ordeal Call — Chaldea commanding Extra Class Servants when humans shouldn't be able to — cites Avenger, Ruler, and Alter Ego as the primary issues. You'd expect the other Extra Classes more detached from humanity, especially Foreigner which has even featured prominently in main story chapters, to be a bigger sticking point, but none of them even mentioned.
- Although Chaldean initially mentions four Ordeal Calls before cutting himself off and talking only about three, so it's possible either the situation with the rest is more complicated, he himself can deal with some of them personally, or something else is going on.
- It may also have something to do with the fact that Apostles of Foreign God belong to these classes - Kirei/Rasputin, Shirou/Muramasa and Douman are Alter-Egos, Holmes and Moriarty are Rulers, and the best known Servant with the title of Count in Chaldea's employ is Dantes - an Avenger. Thus the complication with 4th Call would be U-Olga-Marie herself.
- The Reveal:
- The bleaching of the Earth was indeed carried out by CHALDEAS. This was done by bleaching the surface of CHALDEAS itself and using basic Substitution Magecraft to swap the surfaces of the Earth and CHALDEAS since the latter is a replica of the former.
- The Trees could only be planted on a bleached surface empty of humanity, which means that the humans inside CHALDEAS were wiped out in preparation for Marisbury's plans. The last human alive there somehow found out about this and swore vengeance against Earth, creating the Traum Singularity as a means to do so.
- The human Subject E is the last human who died just a few days before being found. By virtue of being the only human left they became the representative of all humanity inside CHALDEAS as well as the last Master, giving them the ability to summon hundreds of Servants by themselves.
- The Subject E room in Area 51 takes place inside CHALDEAS, and is the only place not to be swapped. The cosmic corridor seen in Traum is because Chaldea was transitioning from Earth to CHALDEAS. This is implicitly the reason for the Ominous Visual Glitch seen when Rayshifting to Traum. This also gives the Foreign Priestess a reason for destroying the room in the Nahui Mictlān prologue, as it deprives Chaldea of a backdoor into CHALDEAS.
- The Reconstruction of Humanity was meant to take place at the end of 2016, but was postponed because of the Incineration. When Lev threw Olga Marie into CHALDEAS, he also threw a proverbial wrench into Marisbury's plans, and the dust has yet to settle for that one.
- "Romani Archaman" reveals that Chaldea's summoning of Extra Class Servants (primarily Rulers, Alter Egos, and Avengers), has resulted in them being seen as "foreign" to the world in a No Man Should Have This Power sort of way. The only way to fix it is to find a way to seemingly prove how these Extra Classes actually serve the Human Order so they can be recognized as naturally belonging to the planet. The preview hints that this is the basis for the next three story chapters.
