Began the entity rework. First up are the Warriors of Chaos because I have more ideas for them.
So far what I got is: the Chaos Shrine becomes the Ruinous Altar. At first you can propitiate Chaos (free) for minor blessings but with an equal chance of becoming spawn or forsaken, that can be friendly or hostile. Once you got enough of the appropriate resource, you can consecrate it into a warshrine dedicated to Khorne, Nurgle, Slaanesh, Tzeentch, or Chaos Undivided. Resources for each are: totems, meat (can be rotten), booze, paper, and warpstone. Still undecided on the quantities.
At each warshrine all reactions will cost the same item (at various quantities) you used to build it. You can propitiate each god (or undivided in it's own case) for a higher chance of mutations with lesser chance of horrible backfiring; you can summon specific daemons (with a very small chance of them either being hostile, nothing happening, or there being an "accident"; you can mark the creature running the reaction (gives a bonus, but locks them out of certain mutations and stuff specific to other gods); you can have the creature running the reaction swear allegiance to that deity (more on that below); or you can train them as a sorcerer in the lore of that god (Khorne and Undivided don't have specific lores, so this is not available for them).
The allegiance will use roses' class system. All who do this will become a zealot of their god (or undivided zealot). As they kill things, they will gain levels and small boosts to their stats. When they reach the max level, if they have enough ambition they will rise to the next tier. Princedom requires an ambition of 85 to reach, and is the max "tier" of the class for those who swear themselves to Khorne, Nurgle, Slaanesh, or Tzeentch. But Chaos Undivided works differently. Instead of becoming a daemon prince, they'll be an Everchosen. But that's not the end of the road, because those Everchosen who have the unlikely value of 100 in their ambition stat will become Grand High Marshal of Chaos and gain insane stat boosts.
Other workshops include the Trial Pit, where you can risk death or injury to increase a warrior's combat skills without waiting for invaders; the Palanquin of Trophies, where you can offer the weapons and armour of your fallen foes to get new migration waves; the Beast Lair, where you can get various warbeasts; and the Arcane Vortex, where you can train sorcerers of the regular battle lores (well, those available to these guys anyway) and can be expanded into the Chaos Rift, where, in addition to training sorcerers, you can also bring forth all sorts of mutants.
Much better than having a single workshop that acts as an effect roulette, at any rate.