Damnation

While this very much works for a fantasy setting, and is a really cool piece regardless, the first thing I think of when I see it is not magic but the ruins of a sci-fi precursor civilization, probably because of the extremely smooth lines on the rhoboids' edges coupled with the circuit-board-like texture on the faces. Makes me think of some VERY similar obelisk structures in the background of Maridia in Super Metroid.