public static MaplePacket skillCancel(MapleCharacter from, int skillId) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();
        mplew.writeShort(SendPacketOpcode.CANCEL_SKILL_EFFECT);
        mplew.writeInt(from.getId());
        mplew.writeInt(skillId);
        return mplew.getPacket();
    }