You want to run a custom build. Takes a little knowledge of event assembler & buildfiles to set up, but nothing too hard.
You may find this helpful:
You can see exactly what I did to insert combat arts into my hack. Past that linked branch I did a lot of things exclusive to Pokemblem, but that branch is probably compatible if you are on the latest skillsys patch, though you’d probably want to add the fix to supply that 7743 made, which I inserted in a later branch.
Feel free to ask for more details on setting things up and editing skills. Good luck!
Edit - details on despoil
Despoil chance to activate:
It’s disrespectful and unneccessary to nitpick someone who is giving good-faith help for free, especially when you’re not the person they’re giving help to, and even more so when you aren’t giving help in the topic yourself. If you don’t have anything constructive or topical to add, then don’t add it.
This has info on running a custom build. However, to copy over hacks from the main skillsys github you will need some knowledge of buildfiles.
The previous links on despoil are just to point you in the right direction.
Zoisite is right - it is asm that controls the chance of it proccing. I simply linked the relevant section of the asm code. You will need to know a little asm to edit that part.
The despoil event, however, is trivial to edit. Just change which item to give. Febuilder can show you which events have recently ran, so you could find the event address pretty easily that way, too.
I would highly recommend you download the skillsys github buildfile and try doing a test edit of something there, first. If you successfully change the % activation of a red gem, for example, you would then copy over the changed code to the custom build. It is much faster to test custom asm in a buildfile than in febuilder, so it may save you some hair pulling.
I’d make it a 100% chance to get an item. And then, I’m not sure what I’d make the item do. But I was thinking of making it decrease the holders stats since that can be done passively. Is there anything else that can occur passively? I just think it’d be interesting to make a character that gets these cursed objects whenever he kills someone.