Now, I'm always a bit wary of uploading just my MOCs here to MOCpages: I usually like to frame my MOCs, and make it look like you are actually in the MOC. Now, after two weeks or so of putting it off, I'm FINALLY gonna upload this one to MOCpages.
This idea was originally going to be a surrealist project I call 'Inversion', with a pyramid shape on the outside and an inverse pyramid hole in the inside. Now, due to bad planning and my love of SNOT, that idea came out terribly, so I plugged up the hole with some black bricks and added a little roof thing, and so the alien pyramid was born. Now, I'm sure that I'll try Inversion again sometime, with a studs-up approach and maybe some slopes to smooth it all off, but for now this is what you've got. Enjoy.