My evil villain mountain lair

I think of it as a fortified bunker built into the side of a mountain, but for a fancy supervillain so it also has to be modern and sleek. (Although it's more of a hill, because I ran out of tiles to build it lol.)

I was inspired by this post: https://www.reddit.com/r/TerrariaDesign/s/PqU8AcQ9v8