I'll hand it to the folks at StarDock, that would be an ambitious undertaking.
Lessee....
LEVEL 4 Path Unlock:
Path of the Artisan
Allows a Hero/Sov with this Path to research & unlock material combinations which can be used in manufacturing Artisan only features.
Example:
A Sovereign levels to 4th level and picks Path of the Artisan {or Inventor or w/e}.
That SOVs ZOI includes an iron node and a crystal node, both producing metal & crystals.
SOV's research path now has a new path called "Discoveries"
SOV starts researching "Discoveries" which at this point, has endless seasons and unknown potential.
Seasons pass. At Season 31 {for ex. maybe a 4% chance per season to Discover something new} [As long as a Crystal + Iron resource or stockpile is available] the Sov has a Discovery!
SOV discovers "Crysteel" - a new production resource from which improved blades, arrow tips, armor, etc. can be made...These Crysteel weapons/armor/bows now appear as part of the production arsenal that his Faction can draw from.
ie. As long as a supply of Crystals and Iron are available, they can be melded in to Crysteel...{2 Crytals + 4 Iron = 1 Crysteel or w/e}
Then, a unit can be equipped with "Crysteel Scimitars" or "Crysteel Chainmail" etc. which is a variation on standard Plate/Chain/Swords,etc.
-Some balancing act would have to be implemented to prevent an Artisan SOV from discovering a combination that basically makes them God-Like.
Other discoveries might include:
Wargs/Horses + Air Shards = Discovery of Winged Wargs/Pegasi mounts that have an enhanced &/or a unique stat.
Grain + Earth Shards = Discovery of a cheaper & or better Food item(s){think Elven Bread from LOTR for example} that can heal health when used by Hero units, or repair injuries from death for Henchmen types.
etc.
etc.
Just a thought on balance is that a SOV might spend a lot of time trying to control one particular resource to try and unlock a new Discovery...all the while, the AI SOVs are building their power base....