Editing Hex Editing - Guide (section)

=== Combination Artifacts ===
Combination artifact's components are specified at a few functions, starting at 0x04c63d. For further reading see BTB2's guide (linked below, as External Link #3). Be aware! BTB2's guide is either wrong or outdated! His method of removing components seems to work correctly, however, most likely due to HotA putting their combination artifacts in HotA.dll to push them in between base game combination artifacts, or for another reason, ''his method of increasing the number of items does NOT work''. 

However, not all is lost. There's 8 bytes of nop (90) commands starting at 0x4c8c8, and we can use them to add an extra item (to showcase it, I'll present a code for adding an extra item to the Ring of the Magi's requirements. This seems a safe method, since only a short push is used, and therefore I advise changes to 3-piece combination artifacts to simply copy this method and swap Ring of the Magi with their edited artifact). 
:0x4c85b 6a '''XX''' (ref item ID)  -> eb 6d (jump 109 bytes forward)
:0x4c8c8 90909090 90909090   -> eb 06..(skip following code)...6a '''XX''' (ref item ID) 6a '''YY''' (2nd ref item ID).....eb 8d (jump backwards 115 bytes)

Replace emboldened text with your appropriate artifact IDs. Remember to also update the number of components (in this example at 0x04C861). 

Note, that the method described above only works for a jump of 125 bytes or less. Gladly, there's a few other empty spaces that can be used for adding extra components: 
* 0x4c25c (11 bytes of nop)
* 0x4c2d6 (10 bytes)
* 0x4c347 (9 bytes)
* 0x4c3c7 (9 bytes)
* 0x4c622 (14 bytes)
* 0x4c8c8 (8 bytes)
* 0x4ca15 (11 bytes)
* 0x4d008 (8 bytes)

Simply use the available space within 125 bytes of the definition of any of the original components. If this can't be done, swap your artifact with another, which can be edited. 

Note, that if you're using HotA, it's much safer to just edit appropriate artifact reference IDs and add other appropriate components (or replace the resulting artifact) by editing Hota.dat (see: [https://heroes.thelazy.net/index.php?title=Hex_Editing_-_Guide/artsinfo0|HotA Artifacts - artsinfo0]