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Control your own Criminal Underbelly

This mod gives the skaven the ability when occupying a settlement that has one of your undercities now it doesn't disappear. Also, now when someone razes a settlement with an undercity beneath it now the undercity remains.

The same for the vampire coast and their pirate coves, and the diferent cults for the diferent chaos factions.

Notes:
Discoverability won't do anything in the undercities that you have settlements above so i recommend not building them, you will sometimes receive a notification that an undercity was discovered but that does nothing because you can't destroy your undercity.
Your settlements can't be target with the hero that gives you the laboratory, but you can conquer the settlement after constructing the undercity.

Warnings:
What happens if you call a vermentide beneath a settlement you own? The army spawns your settlement isn't destroyed and the undercity is destroyed.
What happens with a doomsday device ? I don't know. If you want to test that out and tell me I will be grateful.
The mineshafts (the building that has 10% chance to randomly create an undercity) can't spawn undercities under your settlement, iffy in the comments tested it.
How does the AI react to this ? IDK.
What happens when ...? Idk tell me if you test it out.

Is compatible with everything. It is save game compatible.

Any questions or suggestions I will answer in the comments.