From left to right: Low class birth, Lapis Lazuli. Worst, Lowest, and Weakest Demon Lord, Dantalian. Rank 8th Demon Lord, Barbatos. World’s Richest Man, Ivar Lodbrok. Rank 5th Demon Lord, Marbas. Rank 9th Demon Lord, Paimon.
The light novel is the 3.0 version. Originally, there was a webnovel, then a light novel that failed and floundered, and it got redone and the current light novel version is doing well.
Currently, there are 3 volumes out, and translation by Shalvation is excellent, and he's almost done translating the 3rd volume.
This is not a shonen type light novel, rather it's a seinen light novel where mind games will show up in place of "it's over 9000!" power levels and power creep. The story IS for mature readers and has mature subject matters, and features twisted characters and mind games. There have been numerous comparisons to Light Yagami (death note), Lelouch (Code Geass), and so on.
That said, the artwork is beautiful, the characters are complex, and despite it being a "reincarnation" into a fantasy world light novel, it does not have an overpowered main character. Instead, he is effectively basically baseline human with 1 special trait and knowledge about the setting from the human side that wants to kill him and those like him after the tutorial introduction to the world.
Here is the summary of the light novel from the translation site. I am sorry, but you're going to need to google the translation site up, which is an easy enough task, yes?
Do you know how this world ends?
Become the hero and take down the 72 Demon Lords. The game that was boasted as the absolute hardest strategy game, |Dungeon Attack|.
I used to be the ‘hero’ that had accomplished everything in this game, but after answering a suspicious survey, I found myself in the game as the weakest Demon Lord, |Dantalian|.
With only my eloquent tongue and my memories of conquest as a hero—.
In order to survive as Dantalian. I shall tear this world apart.
Become the hero and take down the 72 Demon Lords. The game that was boasted as the absolute hardest strategy game, |Dungeon Attack|.
I used to be the ‘hero’ that had accomplished everything in this game, but after answering a suspicious survey, I found myself in the game as the weakest Demon Lord, |Dantalian|.
With only my eloquent tongue and my memories of conquest as a hero—.
In order to survive as Dantalian. I shall tear this world apart.
As a side note, this thread is being mirrored on TFF, SB, QQ, and SV. So, if you want to discuss some of the more mature themes or subject matter, you know where to go [QQ].