Myrgard

https://www.facebook.com/groups/mythcommunity/

Someone tell that idiot elfoid to open the group

It can't be opened. Only option to have an open group is to make a new one.

are you sure, I'm the admin of a page for my fantasy football league and I can change the status on of it from closed to open.

It is possible with groups that haven't got so many users. For a bigger group it's not possible