After dreaming about the Mage King Solomon, whom he and Mash were unable to defeat in London, Ritsuka and Mash head to Uruk’s Northern Wall, under the defense of Leonidas of Sparta. Contact has been lost in the still further-north city of Nippur, and the mission is to find and rescue any survivors.
The night before setting out, two Servants have a heart-to-heart, with Ana wondering if it’s time to tell the others about her true identity, and Merlin recommending she postpone that announcement. As a servant who feeds off of human dreams, he understands human emotions, and knows it would be a shock even to any human even Ritsuka.
Upon setting out at the head of a column of soldiers, the party encounters hordes of Demonic Beasts that are larger than expected. Ushiwakamaru and Benkei stay behind to keep the beasts occupied while Ritsuka, Mash, Ana and Merlin head to Nippur. But Ushiwaka senses something unusual about the situation, realizing it is they, not the beasts, who have fallen for a diversionary attack.
Ritsuka & Co. find Nippur already devoid of all life, with a wide and grisly blood trail leading to the highest structure, where Fake Enkidu awaits. When he notices Ana’s ability to slay immortals, he makes her elimination a priority, summoning the lion demon Ugallu. Merlin uses his magic to buff Ana, and she’s able to bisect the beast.
But Ugallu was just more bait. Ana is restrained by the chain of heaven and stabbed by Enkidu. Merlin sends Fou to do what Fou does, teleporting Ana to safety. However, the disturbance causes the awakening of Enkidu (and Ugallu’s) mother, the Goddess of Demonic Beasts, Tiamat. Massive and terrifying, the ordinary soldiers flee before her.
Even Ritsuka and Mash are briefly paralyzed, but Ritsu remembers Leonida’s advice for when you’re scared (which is always the case in battle, or should be): take a deep breath and the muscles will loosen. Tiamat presents the largest threat yet to the last champions of humanity, but for the moment they’re still standing—and a few avenues of victory yet remain.