GWENT Open Online Qualifier 1 is a special tournament for the top 16 players from this list: https://masters.playgwent.com/en/schedule/208/qualifier-1-season-of-the-wolf

The winners of this tournament will be invited to play in GWENT Open in Warsaw . The goal of this tournament is to provide the best pro players with a chance to qualify for one of the major GWENT tournaments in 2020. 

Tournament Ruleset is available here.