Final answer:
The uninvited guest who stabs the Prince faces consequences for their actions, such as injuring themselves, harming others, or reflecting on the unjust laws they perpetuate.
Step-by-step explanation:
After the uninvited guest stabs the Prince, the guest is met with consequences for their actions. In the provided references, there are mentions of assassins who attempt to harm a boy named Gil-Dong but end up injuring each other and a guide instead. In another reference, assassins are sent for to harm Gil-Dong, but he reflects on the unjust laws that deny certain rights to sons of concubines. These examples show that harm and unexpected outcomes await uninvited guests who resort to violence or harm others.