User blog comment:Xilinoc/Ch. 548 - The Thin Ice (hopefully fixed version)/@comment-1747976-20130912153845/@comment-11051098-20130914142717

I discovered that from the Quincy page now.

But still, that doesn't explain how Ichigo seemed to be able to use Blut naturally, without any training, which only Echt Quincy can do. There must be an explanation, unless his Quincy spirit (fake Zangetsu) used it by himself.