possession of, or control over sth which is not shared by others
a right or power held by one single person or group to provide a service, produce sth, etc.
exclusive commodity; business corporation with exclusive control
"a monopoly on silver"
"when you have a monopoly you can ask any price you like"
"They have no monopoly on intelligence"
You have, in this kingdom, an advantage in Lead, that amounts to a monopoly.