Heroes V: Seventh Dragon Era

Seriously? Can you do that? Is it scripts or modifying the executable?

1 gem and 100 gold per day? So that the resource income is approximately the same as from a leprechaun.

Artifact sets are configured in types, Artifacts, and Scripts/A2_SetsArtifacts (as far as I remember, that's what the file was called).

I don't remember exactly right now, but you also need to add something to Defaultstats.xdb!

Everything else is done through scripts.