Itecuku tekii (S04E06)

The man who came to pick up Erica proclaims himself as Darius, head of the Ainsworths and Miyu's kidnapper. Using his great power Darius activates an ice-barrier Noble Phantasm. Even with Kuro's Caladbolg, their attempts to break the barrier barely scratch it while Darius delivers a shocking statement to Illya! (Crunchyroll)