public void updateXenonSurplus(short amount) {
        int maxSupply = level >= 100 ? 20 : level >= 60 ? 15 : level >= 30 ? 10 : 5;
        if (amount > maxSupply) {
            amount = (short) maxSupply;
        }
        client.getSession().write(XenonPacket.giveXenonSupply(amount));
    }