But if the deck is anything like mine, they'll have Image of Jealousy, Blue Tassels, and I am Grace at their disposal...but I digress
Banding defenses have always been a threat in T2. The one thing that kept them in check for many years was AoCP. Eventually we got a few more options such as Trumpet Blast, Samson's Sacrifice, He is Risen, Two Bears--all of which can be made CBN if done right.
The point is, there is no outright anti- "CBN banding" card, but a good T2 offense will always have a way to deal with it.