Here's a suggestion I have, and I don't know how hard it would be to implement, but...

This is based off me assigning Heroes to be governors, and then just mass-buying full garrisons worth of units and then selling those units to the mercenary marketplace, solely to get the governor XP based off industry cranked through in their city. It's highly effective, but mind-numbingly tedious.

So anyway, here's my idea:
Three accessories, in tiers, each of them consumes Dust to feed the hero XP at a 9:1 Dust:EXP ratio. The Tier 1 accessory feeds the hero 1/3rd of the XP they have to next level (such that the hero levels up in three turns,) the Tier 2 accessory fees the hero 2/3rds of the XP they have to reach next level (such that they get 2 levels in ~3 turns,) and one that feeds them 100% of the XP they have to reach next level (such that they gain a turn every level.)

Ideally, there would also be Pearl-hungry versions that give the hero a 7:1 Dust:EXP ratio.

I have no idea how in the world this could be accomplished, though. Is it even possible? What would happen if the Empire ran out of Dust? Could it be made to simply not function, or to draw whatever it could?

Hello,

Just a short message to confirm that should be doable

I even find it interesting and might try it on my free time!