User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170402001949

Wouldn't it be awesome if Issei infused the jewels that were used to seal Grendel and Ladon into his Boosted Gear like he did one of Vali's jewels? I don't know about Grendel, but he could use Ladon's barrier technique. I wonder if that would be possible. But he was able to gain an opposing power by infusing one of Vali's jewels, so I really think it is very possible.