No, time trigger must run for all players. If it runs only once, the other players taverns will be empty.

Also tried feanor code and not good to add IMO. A lot of players generate their random maps in editor first. The script will exit if map is not instantly generated. Delete prisons should work on every map you want to play.

Now, maybe we could think with what replace prisons? Just let empty square? Add maybe a treasure chest, artifact? Or nothing?