Talk:Cris/@comment-26087580-20170609223222/@comment-26087580-20170609232722

But what fuels Juggernaut Drive is the past users' negative emotions, not the dragons'. That's why Ddraig asked Rias and co. To stay far away as possible when Issei first entered Juggernaut Drive. Ddraig is not in command of such, Issei is and, by extension, the past users. Vali also has shown to control Juggernaut Drive because he's just that good.

Juggernaut Drive is a not a good thing. It's an horrible thing. It's not an ability that grants only advantages, it's a curse that kills its user.