public void addDebuff (int id, int debuffLv, int element, int orgDmg){
        for (Debuff d : debuff){
            if (d.getId() == id){
                //increase duration
                d.increasseDuration();
                return;
            }
        }
        debuff.add (new Debuff (id, debuffLv, this));
        dv.setDebuff (id);
    }