The Ancient Hall is a fragmented remnant from the Ancient Times. It was inadvertently discovered by a powerful Viking warrior several hundred Eras ago, after which passageways were opened by many Vikings using Great Divine Power, turning it into a Forbidden Land of the Viking Clan. Within the Viking Clan, only monstrous talents with qualifications above the Saint Level are allowed to train here.
Guding and his group were able to enter as an exception, thanks to Barren's help.
