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If you fix up the springs in the mansion, it opens the option for the birth, Birth + and Birth ++ Options

For some reason, the "birth" skill for Darian's Blessing doesn't show up on a new game for me on the latest build (.320). Some other flags aren't set like the magic shopkeep that you get the Mysterious Artifact quest from states that the player looks to be expecting again, even on the first visit and receiving the quest.