- Utility: Wood Bamboo Wall
- Requirement: 30 woods
- Destruction Panel (F7): 9 woods
- Chance for withstand trebuchet/siege ballista/glider projectile: 0%
Upgrade 1 (F6)
- Utility: Stone Bamboo Wall
- Requirement: 30 stones
- Destruction Panel (F7): 12 woods + 5 Bronze ingots
- Chance for withstand trebuchet/siege ballista/glider projectile: 50%
Upgrade 2 (F6)
- Utility: Bronze Bamboo Wall
- Requirement: 20 woods + 15 Bronze ingots
- Destruction Panel (F7): 12 woods + 12 stones
- Chance for withstand trebuchet/siege ballista/glider projectile: 66%
Upgrade 3 (F6)
- Utility: Volcanite Bamboo Wall
- Requirement: 30Volcanites
- Destruction Panel (F7): 12 woods + 12 Volcanites
- Chance for withstand trebuchet/siege ballista/glider projectile: 66%