If no rule that allows a prince to be “crammed” has passed, Add to the Rule “Theft”:

If a name referring to a prince is in a prince’s inventory, and the prince whose name is in the inventory has an inventory that is not full, the prince whose name is in the inventory may spend one stamina to move a noun from the inventory of the prince whose inventory they are in to their own inventory.

Otherwise, Add to the Rule “Theft”:

A crammed prince with space in their inventory may spend one stamina to move a noun from the inventory he is in to his own inventory.