The castle wall gives you a basic wall protection to your castle or outpost against attacks. This value can then be further increased with using wall tools and having a castellan with wall power. Every castle or outpost comes with a wall level 1 as default. The last level requires you to unlock "stone shell" in your "Hall of Legends" (sovereign buildings, line 4).
|Level||Construction tokens||Upgrade tokens||Wall protection|
|2||1,255 wood & 960 stone||40%|
|3||6,347 wood & 7,627 stone||60%|
|4||22,968 wood & 47,675 stone||80%|
|5||72,010 wood & 80,980 stone||100%|