User blog comment:Xilinoc/Ch. 553 - Frozen Cross/@comment-10330822-20131016154408/@comment-6657474-20131018234919

The only way for Cang Du to activate Vollstandig would be to remove his Sanrei Glove (assuming he has one), and that would be very hard to do immobilized in a giant cross of ice. As for Blut Vene, that only protects against physical damage, I can't imagine it protects very effectively against extremes of temperature.