User blog comment:B214/Volume 23 discussion blog/@comment-175.136.214.240-20171016073623/@comment-1359322-20171027033045

Nah even if Ise can do that with Dragon Blaster or Crimson Blaster, he would probably still go with Infinity Blaster, or at least Ravel would make him use that form. There's a reason for that: To train his DxD G.

By using the Infinity Blaster Ise can:


 * 1) Test the time & physical limit of his DxD G in combat
 * 2) Test hidden potential of that form


 * 1) Ise would eventually face God-class opponents, which mean he may need DxD G. If he immediately tires out after using the Infinity Blaster once, then he would be screwed. How well he can fight after using it is a factor he needs to take into consideration. The opponents he may faced could be stronger than Barakiel and Dulio after all.
 * 2) No matter how much Ise trains, there is only something that can be learnt during combat. Like how Ise managed to find a new ability to materialise DxD G at a specific part of the armour. He didn't attain that with training, he found that through combat. So testing it through combat is equally important.