lets call this mastery "beast within". its a sort of mastery wich makes shifter go in frenzy if the beast gets loose. there would be something like inner beast's anger level wich is seens as adjectives..more angry it,more prone u get to combat frenzy and those with high self-control,control of the inner beast and that beast within % could raise that anger level higher and get more benefits from it.
those benefits would be something like more offensive power in a form of attacks,str and so on..and it would weaken ur defenses quite abit cos u would not care much of your own safety when beast is loose..so it would drop ur avoid,dodge abilities and defense % in combat.
about that anger level,it would be raise from damage u take so everytime u get punishment beast starts to get angry until its so furious that u cannot hold it and have to let it loose.
well that was my idea so i would like to creative comments about it..mostly from wizards
