User blog comment:Xilinoc/Ch. 565 (Mangapanda is run by lazy barnacles)/@comment-24282510-20140124225706

Now i wonder is Yhwach giving them the powers out of nowhere or just boosting their own latent power?

Also the shingimi that have a part of Yhwach's soul we know Ichigo does. I wonder if we got another reason (not that one was give in the 1st place (bankais would block there volldig) or the true reason for stealing the bankais. To give a few shingimi a part of his soul.