An item that can be applied which turns (randomly perhaps) the attacking wave back against the attacker..as a last desperate defensive strategy this would be a laugh. Would add a new dimension to the WC trash talk

Or the ability to apply an item that saps resources from a red, maybe when you are in close proximity to their castle for a set ammount of time. Possibly by percentage of their resources or by res type even.

Or it would be good to curse an alliance and hex all of their markets in every castle so they pay more for res and your alliance pays less (hmmm... could be abused lol) would have to be an expensive item, but if people who bot are not on by the time they all jump alliance in a day or two you guys could have made a tidy profit