In Lords Mobile your Vault protects your resources from enemy attacks on your turf. Increasing the level of your Vault increases the amount of resources that are protected.
If a player successfully defeats your defending army they can steal your resources. The amount they can steal depends on the number of troops they have. Your vault protects a fixed amount of your food, stone, timber and ore, but does not initially provide gold protection.
If you keep your four main resources below your Vault level you will never lose any resources during an attack (except for gold).
Once you get your Vault to level 25 it will then also provide gold protection. At max level you can protect 2.5 million of each resource.
Whilst very useful in the early game, once you get to the higher levels 2.5 million resources becomes almost insignificant when upgrades cost 100’s of millions in resources.
The Vault is still useful to allow you to revive troops after an attack that zeros all your troops. By having a stock pile of resources ready to revive troops you can start gathering again quickly, allowing you to rebuild your army.
Your vault is one of the only buildings that just requires your Castle to upgrade each level.
The table below has the build cost for each upgrade level from 1 to 25, the build time (before boosts), buildings required and the might rewarded.
Vault Building Requirements
Please feel free to leave any details you have from Lords Mobile by commenting below and we will update the data accordingly.