User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-26865730-20150808042203/@comment-26865730-20150808191433

I think you aree prolly right about it being a problem with his pawn pieces. It did say something about there being a problem with it interfering with the original pieces of re-incarnated devils that become Kings.

As for Issei's body not withstanding it... It's not something I would be dogmatic about, but I think Ophis's Infinity power-up probably puts out more than a 100x power-up and has the strain to go with it... Again though, not really a sticking point for me. Issei still pretending to be surprised when one of the girls tries to bed him is a sticking point for me, but king pc v Infinity P-U? meh.