Is this increasing the warehouse capacity on all resources in all villages? I question because it does say 'this resource type' which indicates a specific type not all types. I assume it works like The Vault but it is 10% and not 50%
How long does it last? I am assuming 7 days as you get 10 of them. Can you stack them? If so then you can equate it to two Vaults
I would recommend that you indicate how long it lasts because it is misleading.