After entering the ninth floor, The Conquerors found themselves surrounded by sea water. They at first tried to swim upwards to get out of the water but soon discovered that after a certain height they were unable to go up anymore.
So for this floor they needed to fight while getting submerged in water. But before thinking about combat they needed proper equipment to fight under water as none of them were suitable to live inside the ocean.
Rein quickly took out various pieces of equipment they would need to survive under water. With these not only they would be able to breathe under water but they would also be able to walk normally and did not need to swim anymore.
Even then with the surrounding water obstructing them, the overall combat capability of the whole team was definitely less than normal. So they needed to be extra careful on this floor.
...
Only after wearing the sea specialised gear of a full body suit that tightly hugged their sexy figure and wearing rings and necklaces that allowed them to live under water without problem, Tasha and Stella were able to take a good look at their surroundings.
Rein was also wearing a full body suit and his godly figure was visible to the girls which was making them a bit horny. They should have had more rounds before coming to the ninth floor, the girls thought.
But this was not the time for them to let their guard down and that quickly got back to their senses. They were currently standing on the sea bed and were surrounded by corals of various colors.
Actually, with the dark environment of the sea which was slightly lit up by various light emitting rocks, it created a very magical scenery. If this was not the inside of the dangerous dungeon, then Rein would have liked to enjoy this scene with his lovers leisurely.
Just as they were standing without doing anything while trying to understand their location, their first enemy of this floor approached them. It was a giant Stingray like fish and it came toward them with great velocity.
Just before it was about to ram into them, it turned around and prepared its stinger to impale them.
The three insignias were guarded by great sea terrors who were all greed grade transcendental monsters. Rein's group needed to defeat them in order to get the insignias.
And the Deep Sea Palace did not have any boss monsters inside it, but it was actually filled with traps and puzzles that the conquered needed to cross and only then they would be able to reach the deepest part of the palace.
There they would be able to get the qualification for entering the tenth floor. It was quite a tedious process.
As the three terrors and the Deep Sea Palace were not running away from them, Rein first decided to thoroughly search the whole floor just like he did with all the previous floors.
This floor was extremely vast and took a very long time to properly explore. They also found sunken ships here too and now Rein was sure that this dungeon had a dungeon master who was somehow obsessed with sunken ships and the number three.
But knowing this was not important right now as the dungeon master was definitely staying at the very last floor.
Dungeons with a dungeon master in charge were a bit more troublesome to clear as they would target the challengers with their weak points. But on the other hand, this also made this dungeon to be a bit more predictable than the other dungeons.
This floor also had a lot more treasure scattered around and the conquerors were able to get a huge amount. They especially found a total of 112.7 million zeni just from this floor alone. It was a huge sum of money.
They had also already scouted the three terrors mentioned in the book. One was a Kraken with 12 large tentacles and hundreds of smaller ones. Then another one was leviathan, which looked like a serpentine whale and it was also the largest monster of this floor with a body over a kilometre long.
Then the final terror was a monster called Charybdis. It was a worm-like shark with countless sharp teeth in its mouth. It was most terrifying looking among the three terrors.
The Conquerors decided to not group up against these green grade transcendental monsters and to take them one on one. Rein was going to fight the Kraken, Stella against Leviathan and finally Tasha was going to face off against Charybdis.