Dark Soul's version of mastery is: learn to recognise the monster's attacks, learn how to stay safe from them (and learn what to do when in order to do that, down to precise timing sometimes), learn when they're weak or vulnerable or open to your particular attacks. Learn good strategies, learn even better strategies. (Should you run away, or roll beneath their swing, or roll under their legs, and do you immediately need to do something else right after, and are they vulnerable after that?)