add paper and mailboxes
so you can, for example, create a own newspaper with funny stories, game updates, fight/Building Events.... but you can also write a letter to friend , send them invitations ...
(sorry for the bad english, im german)
Superman(Because why not?) commented
This might actually be okay. So it would be like a PM system in other games, so the receiver can receive messages while offline, and then read them by checking the mailbox?