The Viking has a subscription with a monthly amount of €10 or higher. Vikings with a prepaid card cannot join a Horde. Are you already Viking? You can ut this through your My Normand account: open your internet subscription, go to the 'Product' tab, then click je 'Move subscription to https://www.becharge.be/be-fr/Acheter/cartes-cadeaux-LEGO-Belgium-3-708