Yuusaku manages to capture the the Mysterious Lifeform as he pursues the hacker group "the Knights of Hanoi." To defeat the Knights, he logs in to the VR space "LINK VRAINS" as "Playmaker" and challenges them to a Duel with the Mysterious Lifeform as a hostage.
In other words, Cracking Dragon and Pulse 
Mines's effects don't work against Decode Talker!
Was bedeutet, dass die Effekte deines
Cracking Dragon und deiner Pulse Mine
En otras palabras,
¡el efecto del Dragón de Pirateo
Ou seja, o efeito do seu Cracking Dragon e das suas
 Pulse Mines não funciona contra o Decode Talker!