Dungeon Defense

[Adapted from one of the top novels of all time!]
Do you know how this world ends?
Become the hero and defeat the 72 Demon Lords. The game that was boasted as the absolute hardest strategy game, 『Dungeon Attack』.
I used to be the ‘hero’ who 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.