Thanks to Ana’s immortality-nullifying Harpe, Gorgon/Tiamat is defeated in the episode’s first five minutes, which should have been the herald of good news, were this the final or penultimate episode. Of course, with a whole half-cour remaining in F/GO: ADF-B, the humanity and it’s heroes climb out of one hole only to find themselves at the very bottom of an even larger one.
Depsite Ana’s sacrifice, Gorgon did not possess the grail required to collapse the seventh Singularity and end the war. Kingu still has the grail, and was planning on killing Gorgon all along in order to awaken the real Tiamat, which Merlin calls an “Evil of Humanity” before vanishing after a massive “spacetime quake.” That’s right, Ritsuka, Mash & Co. will have to fight the true boss without Ana or Merlin. Bummer.
The real Tiamat doesn’t awaken immediately (though we do catch her seemingly yawning), but from the epicenter of the quake, an impossible force of 100 million beasts emerge, and thousands of them are already attacking Uruk by the time the heroes get back there. These creatures are apparently the species that will serve as the “New Humanity,” and they’re effectively fearsome, offputting, and implacable.
Those attacking the city suddenly withdraw without explanation, enabling Ritsuka’s party to meet with Gilgamesh. He has no orders for his people but to either fight and die in Uruk now or flee north, and perhaps live a bit longer.
When Ritsuka notices Siduri is missing and hears what happened, he demands to be given leave to rescue her in Eridu, where she was taken by the demented monsters Romani names lahmu. What seemed like an opportunity to raise some spirits in Gilgamesh’s court by rescuing his beloved scribe turns sour almost immediately…this episode is merciless in the crap it throws at the heroes.
Siduri has already been transformed into a lahmu, who are totally indescriminate in their torture, mind-manipulation, maiming and killing of “old” humans. Kingu stops this chaos, disgusted by the behavior of his “siblings” but determined to lead them and whip them into shape. For his trouble, he’s stabbed in the back by a lahmu, who sadistically tells him he’s “boring”.
Allies and villains are dropping like flies, replaced by ever more unreasonably monstrous foes. How Ritsuka is going to be able to salvage this situation short two servants is beyond me. And, as always since her capture, Ushiwakamaru remains an unseen, heartbreaking threat