Carl's spell from the Legendary 1914 Box, dwarfed in capacity by Donut's War Crime from the same box.
Carl notes that his Run, Little Günter, Run spell came from the same Legendary 1914 Box that gave Donut War Crime, and that the sheer difference in capacity between the two spells is astonishing. It is the comparison that frames his dread of the plan: one box, two spells, and only one of them classed as an Atrocity.
Carl's 1914-box spell, and the yardstick that shows how monstrous War Crime is by comparison.