Food process wafers and mix with butter.
Press into 5x14 pan with removable bottom.
Freeze for a few minutes.
Meanwhile, place both chocolates in a heat-proof bowl.
Heat cream just to below a boil and pour over the chocolates.
Whisk until smooth.
Pour over the crust and top with berries.
Chill 2 hours.
Drizzle on the 1 ounce melted milk chocolate.