Talk:Siege Mode/@comment-5171262-20130502062957/@comment-5171262-20130503134231

Based on my observation, it will work with other castles. I came up with a theory on how this worked, it may also do the opposite (if the next overlord's minion is low level).

So basically, you have a castle with you as the overlord, you then wait Inside the Castle until the next overlord conquers your castle. Leave the device for a couple of hours (wait for the time when it changes the overlord) then when done, open the device again and see if the new overlord's minion's level overlapped with yours.