User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-67.176.158.104-20140207023318/@comment-16281343-20140207041331

Juggernaut Drive releases the true power of the Two-Heavenly Dragon, but with the cost of the user's life.

CCQ and EJOD also does the same, but without the harmful effects. So why use JD?