public static byte[] skillEffect(MapleCharacter from, int skillId, byte level, short display, byte unk) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

        mplew.writeShort(SendPacketOpcode.SKILL_EFFECT.getValue());
        mplew.writeInt(from.getId());
        mplew.writeInt(skillId);
        mplew.write(level);
        mplew.writeShort(display);
        mplew.write(unk);
        if (skillId == 13111020) {
            mplew.writePos(from.getPosition()); // Position
        }


        return mplew.getPacket();
    }