Spire

My first time with Vue- lovin' it so far!

This is one of the twelve spires that are on my world. They function as energy containment wells for the entire planet. I'm not sure if they're 2 km tall or 20.
They weren't actually constructed- they were put down by a higher species along with the "critters". They divvied up into a bunch of factions- one being the "Spire lords". They built cities around the spires and were the most advanced of the groups.
The fighters in the picture are more like biomorphic birds than anything- they shape shift, and instead of shooting plasma, they ram.
TLDR