 ", they are revealed to have made a previous attempt to kill the first DigiDestined but are defeated after Tapirmon sacrificed himself so his fellow Digimon can digivolve into the Digimon Sovereigns.In 1999, the Dark Masters take advantage of the DigiDestined's absence by sealing away the Sovereigns and converting the Digital World into Spiral Mountain which is divided into four territories.As the DigiDestined learn, each Dark Master's defeat causes their domain to dissolve and be restored to its original form.