Lokhim Construction Guilds:

Upsides: Gain the ability to upgrade one district per era with double the effects, counting essentially as having a second copy of the district in the same hex, taking up the same slot. Only 6 districts may be upgraded at a time within the owner's nation itself, regardless of the total max of the wonder. A willing nation, within diplomatic range with a defensive pact, military pact, vassalage, ar a non-aggression pact may have districts upgraded, paid for by the Wonder owner. - (Districts may be downgraded at will by their respective owner, but no resources will be returned.) +5 resource stockpile max Downsides: Only already constructed districts can be upgraded and base cost double construction cost listed in the guide. Each session there is a 5% chance that the guilds in charge of the wonder will demand concessions or begin a strike, increasing by 5% each time they do not demand concessions, are appeased or are on strike. While on strike, all upgraded districts within this nation will cease to function until the following conditions are met. 1d6 random non-research resources per upgraded district must be paid, and a Normal quest must be completed. Once these conditions are met, the districts will function again. If the resources are paid and the given Quest is actively being worked on, the strike enters 'Appeased' state where the districts are working but no other districts may be upgraded. Stopping progress on the quest will resume the strike but not increase the demanded resources. You may sacrifice pops of your culture and religion to the wonder, narratively giving privileges to the guild workers and exempting them from certain national requirements, to increase the base amount of districts able to be upgraded. It starts at one pop per, multiplying by 2 each time this is enacted. The first unlocked district requires a single pop to be sacrificed. (Units already recruited are not lost if their upgraded district is disabled due to the strike, but more cannot be hired until the strike is fully resolved.)