I am just not sure how the power of the knife works. Can the person who has the knife really just order the dark one to do what they say or is it more complicated then that? It doesn’t seem like the please works in the same way. It is just that we have no idea how much the original dark one was telling the truth about the knife because he was trying to get Rumpel to kill him. We don’t really know enough about the limitations of his power.