Intimidation
Intimidation takes many forms, from outright threats and physical violence to mere force of personality. It needn’t be course or callous, and a well-placed intimidating word under the right circumstances might well be called “diplomacy” in certain circles. You know the right method for each occasion, and can be very… persuasive.
0: You're cute as a kitten!
1: You were that childhood bully.
2: You know how to throw your weight around.
3: You regularly win staredowns.
4: You've got a reputation that gives people pause.
5: Your threats are so inventive that they're almost legendary.
6: You could make Chuck Norris flinch with but a glance.