They are also handed D-Terminals with Crest-themed Digi-Eggs, which allow their Digimon companions to undergo Armor Digivolution in order to combat the presence of Control Spires. and Kari, each owns a D-3, a brand-new kind of Digivice that lets them open a gate that sends them to the Digital World through any computer. To combat him, 3 new DigiDestined are recruited, each gaining a historic Digimon for a partner. Four years after the activities of Digimon Adventure, the Digital World is invaded by the Digimon Emperor who’s enslaving Digimon with the Dark Rings, at the same time as constructing Control Spires that negate Digivolution.