Once Natsu realized how much it would have cost him to build a Last Save Portal in every floor, and he could do it for free with what he obtained, Natsu no longer felt bad for not obtaining anything which would've made his Dungeon stronger in the present.
Sitting up on the bed, while not even feeling the slightest bit shy from making hid naked dick visible to the three women inside the room, Natsu checked the DP he had, and started making changes.
By now Natsu had already learnt, that as the number of floors increased, the size of the higher floors had increased as well.
There wasn't too huge of a difference between the first floor and the second floor, but Natsu guessed that the difference was around 100 feet.
So, if he wasn't wrong, once Natsu added an additional floor for 500,000 DP, the size of the third floor should most likely be bigger than the second floor.
Not hesitating in the slightest over spending half a million DP, Natsu added the third floor to his Dungeon, and started making changes to his Dungeon as a whole.
Other than the first floor, which Natsu left untouched and let it remain the same way. He totally changed the second floor and the put the third floor he just added to complete use as well.
Moving everything other than the maze, Orcs, and Fire Orcs to the third floor, Natsu changed the complete second floor's terrain to the Terrain of Lava.
And in it, he placed the 100 black coloured Direwolfs which he just bought.
Next, he split the third floor which as expected was bigger than the second floor into three equal parts.
In the first part which was where the stairs from the second floor led, Natsu placed 50 long Serpents of Darkness.
In the second part, Natsu turned it into two halves and gave one part to the Dwarfs, while the other one was given to Carla, and the newly purchased 25 Dryads.
Fun fact, Dryads were a race that only consisted of females!
Another fun fact, they were all beautiful women who didn't wear any clothes!
Unfortunately, Natsu knew that now wasn't the time to let his perverted desires get the better of him, due to which he had Carla take them away.
In the third part, Natsu once again split it into two parts.
Of the two, one was used to contain the rooms which he increased in size. While the other one wasn't divided into rooms, but left completely empty.
Just as the three curious women were about to ask Natsu what that empty rectangle space on the third floor would be used for, Natsu gritted his teeth and spent a total of 1 million points to buy the limited sale item - Throne Room!
The next instant a loud rumble sounded alongside a tremble which made the whole third floor vibrate.
Listening to that sound, Natsu hastily left the room with a bedspread wrapped around his waist and made his way to the where the sound came from.
Entering the room which had he placed as the location for the Throne Room, Natsu despite having expected something grand, was still totally stunned.
Similar to the name, the rectangular room was turned into a Throne Room which Natsu had seen in images and videos which showed the palaces of kings in the past.
Inside the room, there was one huge throne on an elevated pedestal, and it was made of steel.
The various smaller thrones on the other hand which were on either side of the room, they seemed to be made of iron, which showed that the main throne was of a better quality than the others.
The Throne Room which Natsu bought was a special purchase which was only available for the various Dungeon Masters of Earth to buy within a time span of 72 hours, in anniversary or its sixth month taking over the Earth.
Unfortunately, due to how much it cost, and how less the information that was provided on it, not many were willing to purchase it.
But, once Natsu's Great Tokyo Dungeon reached Lvl 2, he was now able to see information about it.
Turns out the Throne Room was a special item which when used, would turn a certain area into a throne room, and the number of smaller thrones available would depend on the chosen room's size.
Also, along with the increase of the Dungeon's Lvl, the Throne Room would also look more beautiful and grand. That is, it was most likely the materials of the thrones which would increase.
Either way, Natsu had already purchased the Throne Room, and he was quite satisfied with his purchase.
After all, sitting on that throne would definitely make Natsu feel very proud, like a real Ruler.
Once he was done with turning his previous two-floor Dungeon, into a three-floor one, Natsu noticed that he had spent a total of 2.5 million in his purchase.
And even though he purchased them all together, he didn't receive 500 lucky draws like expected.
He had only received 50!
"Rias, how come I've only received 50 lucky draws?"
"I almost forgot. Once a Dungeon reaches Lvl 2, you receive a lucky draw for every 50,000 DP you spend."
Seeing Natsu's disappointed face, Rias added, "The rewards you obtain from the lucky draws are also increased by a level, darling. And since you are the first one using the Lvl 2 lucky draws, the rewards you obtain for a certain time are going to be the ones you are in need of."
"Okay."
Feelings curious about how much better the rewards might be, Natsu started his first lucky draw, and stopped it without waiting for long.
[Obtained 1 x Terrain of Darkness]
Checking the reward he obtained with a lot of curiosity Natsu ended up being disappointed due to its one and only limitation.
It can only be used to change the terrain of one floor at most.
Other than that, Natsu could change the floor which would use the terrain at any moment when the Dungeon reaches the next level and is under augmentation.
Still, these rewards were obviously much better than the ones he received previously. And, he obtained this at the right time, because it suited the place where he placed the Serpents of Darkness at.
After all, Natsu didn't turn that area into the Terrain of Lava, because even though it might allow the snakes to evolve into fire-based monsters, that would completely destroy their original special capabilities of slithering in the shadows and sneak attacking.
Immediately using this, Natsu changed the terrain where he placed the Serpents of Darkness into the Terrain of Darkness and added one Last Save Portal in every floor before ending the Dungeon augmentation.
*****
[Dungeon Name : Great Tokyo Dungeon
Maid : Grayfia
Dungeon Lvl : 2 (XP : 10,003/100,000)
DP : 2,949,500
Personal Guard : Erza Scarlet
Number of Dungeons Monsters : 16,728
DP Produced Per Day : 550]
Dungeon Master Natsu's Aggregate Dungeons' Stats -
[Number of Dungeons : 15
Dungeon Names : Great Las Vegas Dungeon (Lvl 1), Great Hokkaido Dungeon (Lvl 1), Great Seoul Dungeon (Lvl 1)....
Proxy Dungeon Masters : Amanda Fletcher, Anastasiya Smirnov, Shilpa Aurora...
Maids : Orihime
Total DP : 2,460,875
Personal Guards : Yoruichi Shihōin (Grade : SSS), Nana Shimura (Grade : SSS), Retsu Unohana (Grade : SSS)…
Number of Dungeons Monsters : 58,457
DP Produced Per Day : 4,125]