public List<Integer> usedBuffs() {
        //assume count = 1
        List<Integer> used = new ArrayList<>();
        MapleFamilyBuff[] z = MapleFamilyBuff.values();
        for (int i = 0; i < z.length; i++) {
            if (!canUseFamilyBuff(z[i])) {
                used.add(i);
            }
        }
        return used;
    }