Just read the Wiki's complete synopsis for Sword Oratoria 12 from Angelo. Fortunately, I was able to incorporate changes to this fanfiction to maintain more consistency with the big reveals in Sword Oratoria 12.
WAR
Following a map created from Riveria's magic circles, the attack groups moved forward. At a fork, the group including Finn, Bete, Ais, Bell, Raul, Lefiya and Filvis went left in a fork while the other group with Gareth, Riveria, Tione, Tiona, and the 4 Gulliver brothers, went right.
- With Finn's Group -
As Finn's group walked through the Knossos, they were attacked by violas and water spiders. After battling numerous monsters, they reached a large room. Valleta was in the room. After ranting based on her anger about Finn, she had a very large number of violas attack them. As they traversed the room, many water spiders also appeared. However, Bete destroyed most of the spiders. Suddenly, Finn was very concerned as his thumb ached a lot. Despite his caution, Revis appeared from a secret door and gave him a very deep wound.
Acting quickly, Raul grabbed the severely-injured Finn, and the entire group headed down a hole while Valleta laughed about Finn's injury. With Revis and Valleta giving chase, the rear guard, Lefiya and Filvis became separated from the rest of the group when Valleta shut the door on them.
Raul and Aki then tried to treat Finn's wound, but they could not make the wound close no matter what they did. Thus Aki realized that Revis must have used a cursed weapon. Unfortunately, Valleta was still chasing them, and thus they had to carry Finn to a safer location.
- With Gareth's Group -
Gareth's group also ended up in a room like the large room Finn's group went into. Barca was in the room and was upset about their presence in the Knossos. Barca activated a large red jewel in the middle of the room, causing the entire group to fall into the trap that covered the entire floor.
- In the Control Room -
Barca and Dix watched videos of adventurers using water films on the pedestal. Barca suggested that monster smuggling would become difficult if the adventurers were successful, forcing Dix to go join the fight.
As Dix went off, Barca continued to monitor the adventurers through the water films, and made them suffered through additional traps using his eye to remotely activate the doors and traps.
- Lefiya and Filvus -
After being separated from Finn's group, the two Elves reached a corridor that looked different from the rest of the labyrinth. The area had multiple pillars with walls covered with murals likely from ancient ruins outside Orario. The themes of the murals were disasters and destruction, with one having a large dragon with 6 women around it. The 6 women had folded arms and closed eyes, which made Lefiya wonder if they were being sacrificed or if they were saints.
Suddenly Thanatos appeared behind a pillar. After introducing himself, he told them that the dragon was the Nidhogg, the most feared dragon in the ancient world until the 3 disasters appeared.
Lefiya "Are you Enyo"
Thanatos "No, I have never heard of Enyo"
Lefiya "Why do you want to destroy Orario?"
Thanatos "Not every god in Evilus is evil, but some are just bored while some wanted to create heroes"
Thanatos "I preside over death, and the lower world is less fun now because there is less death with the falna. With less death, there is less work for me."
As several Thanatos members arrived, Filvis used Dio Thyrsos to blind them to cover the escape for Filvis and Lefiya.
- With Reserve Group -
Using the communication device, the reserve group learned of Finn's injuries. They made the decision to take Finn out of the Knossos. To help with the evacuation, Ottar and Allen would enter the Knossos to meet up with Finn's group for the extraction.
However, Ottar decided to hold off on activating their ace that was Haruhime's boosting. They could see that the enemy had the advantage using traps, but so far there was nothing that warranted the use of level boosting. They need to conserve their advantage as once the 15 minutes of boosting was used up, they would have to wait 30 minutes before boosting was available again.
- With Finn's Group -
After communicating with the reserve group, they decided to separate into 2 groups. Ais, Bell and several other members would engage enemies, while Bete, Raul and support members would carry Finn to meet with Ottar and Allen.
Seeing Bete's group trying to carry Finn to safety, Dix tried to use his curse, Phobetor Daedalus, to attack them. Fortunately, Bete and Raul were able to escape from it, but it did affect more junior members. As Bete and Raul ran away with Finn towards the meeting location with Ottar and Allen, Bell and Ais came in to stop the affected members from attacking Bete, Raul and Finn.
With Bell and Ais' group protecting them, Raul and Bete were able to carry Finn to the meeting location. Ottar and Allen were already there waiting. Raul then followed Ottar back towards the entrance while Allen went with Bete to assist the attack groups.
As Ais and others bought time by blocking the attacks from the affected members, Bell tried to stop the caster to end the curse. Bell immediately launched a huge numbers of firebolts at Dix. Several firebolts impacted Dix, and the curse was ended. Seeing his advantage taken away, Dix ran behind a trap door.
Suddenly, a red hair woman appeared...
- With the Reserve Group -
They were glad to see Finn rescued when Ottar and Raul brought him back. Seeing Finn's wound was not healing with healing potions, they immediately had Raul and a couple supporters carry Finn to Airmid's infirmary. Ottar then suggested that everyone get ready as it appeared they may soon enter the battle.
- With Gareth's Group -
Tione, Tiona, and a few others were wandering through the hallways until they became separated. Tione's group was attacked by assassins while Tiona's group was assaulted by monsters including a large number of Poison Vermis. Meanwhile Gareth, the Gulliver brothers and several others were suicide attacked by Evilus members, who drove them into a Kaenseki trap. Even though Gareth's group ran as fast as they could, they were trapped when a trap door shut ahead of them...