Obsidian pillar with lapis block on top

Is there any deeper purpose in these obsidian pillars? enter image description here

They appear most often in the twilight forest but I think I have seen them also in the the overworld.


No, they are purely decoration. Pillars in the overworld that look similar (but smaller) are totems from Thaumcraft, but in the Twilight Forest these are just part of the scenery.