User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-34061653-20190122110131/@comment-10330822-20190201034428

But that's just my point. Emotion got involved. Which is stupid, because everyone was telling "Issei" not to do it. Apparently, no one needs to follow the advice they give others.

Then I must be confused. I was under the impression that the Pseudo DxD starts at 88 and goes down to 8 to summon Ddraig. In other words, 80 minutes needs to pass, that's why the summoning is limited, because Issei can only maintain it for 8 minutes until his form runs out. That's why Ddraig was never summoned in the beginning of fights, either against Vidar/Typhon or Nyx, it was always at the end, then the form was less than 10 minutes from ending.