User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-2405:205:118C:74F6:7DFF:974C:AC29:922E-20180425050623/@comment-10330822-20180427042009

To be honest, we don't know what effect losing the previous possessors has on any probablity of Juggernaut Drive. Honestly, with the ability to promote whenever, and complete control over CxC, there isn't really a reason to even have an EJOD. That just seems to be Vali's answer since Vali can't promote himself.

Besides, CxC was to be mastered by mastering the Illegal Move Trinia, which is essentially three forms of Juggernaut Drive. You master the three forms, you master Juggernaut, and thus master CxC.

Besides, I sort of doubt it would help anyway, since the Promotion also gives him stat boosts in speed, strength, and magic power. If anything, it gives him a slight edge over Vali's EJOD.