After the first party which entered his Dungeon was exterminate, Natsu closed the live video feed when he saw the monsters feasting on the dead bodies.
"Usually the bodies of the dead intruders are absorbed by the Dungeon, and therefore disappear. But, if any of the monsters start eating the dead bodies, the Dungeon will wait until they are done before it absorbs them, darling."
Nodding her head and thanking Rias for the explanation, Natsu called up for the Dungeon's stats.
[Dungeon Name : Great Tokyo Dungeon
Dungeon Lvl : 1 (XP : 11/10,000)
DP : 10,275
Personal Guard : Erza Scarlet
Number of Dungeons Monsters : 14
DP Produced Per Day : 250]
Indeed, the DH System worked fast and without any lag. Every time an intruder died, Natsu received a notification that he obtained 500 points.
And after all ten intruders died, Natsu obtained a total of 5,000 points which increased made his DP enter a five figure sum.
Remembering how easy it was to obtain these particular 5,000 points, Natsu began thinking that being a Dungeon Master was quite good, since obtaining DP turned out to be easier than expected.
If this kept up, and his Dungeon was raided by eight more such parties, Natsu would be able to add a second floor to his Dungeon!
But before that, Natsu needed to increase the capabilities of his Dungeon. And the first thing he needed to do was, increase the number of monsters inside his Dungeon, starting with the Dwarfs.
[Miscellaneous items - 500 DP
Dungeon Monsters - 4,500 DP
> Goblins x 5 - 500 DP
> Kobolds x 5 - 1000 DP
> Orc x 1 - 1000 DP
> Dwarfs x 4 - 2000 DP
Total - 5,000 DP]
Double checking his cart before purchasing them, Natsu spent 5,000 DP to obtain a few Dungeon Monsters, some armour for himself, and one more lucky draw.
The next instant everything Natsu purchased appeared before him, following which he sent the combat monsters away through the map to their assigned locations, and sent the Dwarfs to meet with the first Dwarf and get started on producing weapons.
Originally, Natsu had a few worries about how monsters would increase in level, after learning that they weren't related to the Dungeons level, and instead each had their own way of growing.
Natsu was also specifically worried about the Dwarfs, because unlike other monsters they weren't involved in the fights, which he assumed to be the way monsters grow stronger.
Luckily, once Natsu asked Rias about this, all of his worries disappeared in a flash.
As it turns out, monsters do grow strong by fighting, but that wasn't the only way they accumulate XP and increase their level.
Other than just fighting, each monster has a specific method depending on their Race to grow stronger.
For example, Dwarfs grew stronger by forging equipment. Goblins grew stronger depending on how many offsprings they produced, the level of Fairies increased depending on how well they maintained the relationship between monsters and the Dungeon Master, and how well and beautiful the plants they grew were.
Like this, each monster had a different way of growing stronger.
Anyway, after sending the newly summoned monsters away, and storing the items he bought for himself, Natsu got ready for his second lucky draw.
After having obtained the Dungeon Master Beginner Set in his first lucky draw, Natsu was very excited to see what he would obtain now.
"What do you guys think I'll obtain from my second lucky draw?"
"I think you'll obtain a strong weapon to slaughter your enemies, Master."
Nodding his head towards Erza who was standing guard beside the bed, and not sitting even when he suggested, Natsu looked towards Carla who was resting on his chest.
"Master will definitely obtain many seeds to grow beautiful flowers!"
Silently praying that he wouldn't obtain such a thing, Natsu finally looked towards Rias, who said, "Whatever you obtain, I'll be happy for you, darling."
Smiling towards this wife like answer, Natsu called for the lucky draw.
Seeing the same circle which was made of ten parts, Natsu didn't bother thinking too much and said, "Start", after which he waited for ten seconds and said, "Stop".
Ignoring Carla who was pouting from Natsu not letting the arrow spin for longer, Natsu patiently waited to see what he would obtain now.
Like before the nine other parts faded away, and the part the arrow landed on began shining and revealed what Natsu obtained.
"Random Dungeon Teleportation Button?"
Seeing what he obtained, Natsu directly opened his inventory and took it into his hands.
The item Natsu obtained looked was a small grey coloured disk, with a red coloured round button on it.
[Random Dungeon Teleportation Button]
[Clicking the button for the first time will randomly teleport you inside any Dungeon. Clicking the button for the second time will you bring you back to the Dungeon you left.]
[The teleportation is limited to the Dungeons in the vicinity of your world.]
[The Random Dungeon Teleportation Button's first click can only be used when you are inside a Dungeon.]
[You can only take a maximum of two individuals along with you.]
Reading all the details about the buzzer like item in his hands, Natsu had to admit that this was something he both wanted and needed.
After all, while Natsu did want to try raiding Dungeon to increase his personal strength, there were many problems which stopped his from trying to enter one.
These included, but were not limited to, the distance to the closest Dungeon being too far, unable to leave a Dungeon and retreat if he chose to, and the notification which would let other Dungeon Masters know if he took Erza and entered a Dungeon.
But now that he had this button which would allow him to enter and leave a Dungeon at any moment, Natsu wouldn't have to worry about being trapped inside a Dungeon.
And, after entering the Dungeon with Erza in tow, Natsu could scout around and decide how long he could fight before retreating, whether he should try to conquer the Dungeon, or leave immediately.