Dear Blackthorn Arena players,
Due to unexpected problems in the steam store, DLC is still unable to make a purchase. We have tried to communicate with the Steam customer service, but now the steam customer service has not replied to us (Might be Holiday delay). Please wait patiently. We will inform you as soon as we hear from the steam customer service. Thank you
DLC-Path of Kiren Announcement
Source: Steam Community (opens in a new tab)