So ran into something weird trying to run this decision - I had a bunch of Gen V and IVs in my prison, but I was not getting credit for them, so was not able to unlock the decision. Trackedd own the file and it is

any_prisoner = {
count = 10
vampgeneration_less_or_equal_to_trigger = { LEVEL = 5 }
}

So I started eating through prisoners until I was back down to 10 and the decision became available. I think it needs to be changed to >= instead of =


There may also be an issue with the tooltip. It says [some random province] has to have the subdued cathedral of flesh, which is impossible since that is a unique building (it can only be in one specific location). This is a tooltip issue though I think, the actual code is

any_realm_province = { has_building = cathedral_of_flesh_03 }

So it looks like it is ok to capture and subdue it where it really is, and ignore the province listed in the tooltip... But I wouldn't know. 6000 Piety is... insane as a requirement (how much it takes to subdue that building once you get it). Fortunately getting 5 ghouls is totally doable.