Just a random thought I came up with:
The transfer of prisoners to the prison of an allied realm.
For example, a particular realm captures a prisoner that is wanted by an allied realm. Prisoner can be escorted to the other realms judge for sentence.
Of course during transport, the prisoner has a random chance of escaping.
Netherworld may catch a prisoner that is wanted by Spearhold, or Gotland catches a certain prisoner that is wanted by Nothoi
![Tongue :P](https://forum.battlemaster.org/Smileys/default/tongue.gif)
Exploits? : A prisoner captured by a realm who hasn't yet issued a ban can be transfered to a realm already with a ban in place, allowing immediate execution.
As I said, just a random thought. I haven't thought about it a great deal. the idea might get thrown out instantly for various reasons, which is fair enough.