class Trait:
    def __init__(self, name, buff_value):
        self.name = name
        self.buff_value = buff_value

    def trigger_effect(self):
        print(self.name + " gives a buff of", self.buff_value)

class RewardTrait(Trait):
    def set_price(self, price):
        self.price = price

savant_trait = RewardTrait("Savant" , 5)
savant_trait.set_price(2000)
print(savant_trait.price)