Arcane Fulcrum

When a Storm of Magic ravages the land, Arcane Fulcrums rise to meet it, great supernatural pillars from the top of which a mage can attempt to harness the magical energies raging all around. Usually, when the storm abates, the fulcrums crumble away, sinking back into the earth. Sometimes, however, the land is so wracked with sorcery that the Arcane Fulcrum remains long after the storm has passed.

Famous Arcane Fulcrums

 * Pillar of Bone

Source
pg. 11
 * Blood in the Badlands