Yamatai Pillar

Description
Pillars offer stability to tall structures, allowing height to become a significant factor in building. Be aware, however, that pillars also offer a unique weak point for enemies to attack. Weapons barely chip it and even explosive powder is not enough to weaken it in a single blow. Siege weapons or divine intervention are really the only way to bring down walls this strong.

Repair
Repairing  requires up to:
 * 6
 * 2
 * 2