well in answer to your question:
on the "Sparta" server ( the latest server) isy will spawn just like
any normaly monster would, only with the added feature that she will
be untouchable and only fast lving players and bot would get to her
first.
Also once in Bable (a few weeks ago) TG spawed, but because of the
recent server inspection no one went to attack her. so she stayed wondering around her spawn area for almost 4 hours until she was finally
killed.
