[Avrorrange]

Spoiler for Vol 13 spoiler and quick summary:

Alec 'woke' Circe up to investigate whether Odysseus was the Last King. He had 35% confidence that he's the Last King.

Alec became Circe's 'lover' for a couple of days before he tried to escape--they fought each other and Alec temporarily locked her up with the labyrinth.

A few years later,someone then fired a divine arrow to Tokyo to challenge Godou.

Team travels and locates where the bow that fired the arrow originated from. They are then attacked by Circe's familiars.

Team tracks Circe to an island off the Malaysian part of Borneo.

During the fight on the island, Circe steals every single avatar of Verethragna except for the sword, the youth and the camel and uses the stolen avatars against Godou and harem.

After the girls defeats the boar, Godou uses the 'Blackhole sword' to destroy the whole island.

After using the Black-hole sword, Mariya and Godou were separated from the rest of the girls. They managed to get drifted to an inhabited Malaysian Island unharmed thanks to Kusanagi sword and they spent the night together in the same room.

Circe then took them to her other island.

Circe was revealed to be a sl@tty yandere. Her desire was to turn Mariya into a bird(since Mariya loves Godou) and to split Godou into pieces so that she could turn him into a trophy she could love forever.

Circe was half dead when she met Godou--roughly half of her body parts were made from synthetic material, since during a fight with Alec when they broke up, she was badly damaged.

Godou uses sword to retake his abilities and further weaken Circe.

Circe then uses a blood curse to bolster her abilities under the condition that if she fails to kill Godou, she would die. Under the buff up, she was able to summon her old lover, Odysseus not as a subordinate, but as an ally to fight.

Odysseus was revealed not to be the Last King as he does not have the affinity of steel. He functions similar to Berserker(Fate/Stay Night) as he did not talk except for growling or screaming.

The other girls arrive just in time to participate in the last fight.

Odysseus was burnt by the horse whilst his limbs were cut by Ena using the Kusanagi Sword.Circe was also burnt in the process--which becomes fatal as she was half-dead already. Odysseus disappears after Circe was no longer able to support his materialization.

Before Circe dies, she was offered the chance to flee to the Astral Plane by Godou, but rejects it out of pride, also wanting to give Godou half of her life as an authority. She also tells Godou clues as to who the Last King might be, telling him to investigate the Argonauts--a piece of knowledge she intentionally kept from Alec. She dies from a heart failure as result of the curse.

Godou got a new authority--but it is not yet known what it can do. It is also unknown why he was able to get a new authority considering Alec did half the damage on Circe. It is also unknown as to how powerful this authority would become, considering that Circe was half dead at the initiation of the fight.

Godou and Mariya gets interrogated over what they did during the time they were alone with themselves.

Author states that he was impressed by the cuteness of Lilianna in the anime and asked people to watch it.