public static byte[] skillCooldown(int sid, int time) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

        mplew.writeShort(SendPacketOpcode.COOLDOWN.getValue());
        mplew.writeInt(sid);
        mplew.writeInt(time);

        return mplew.getPacket();
    }