Has anyone ever suggested Carat BM boxes or an alternate type of carat key that maybe costs double what a normal key that opens the same BM box would but can contain alternate version(s) of BM sets, such as DH13's Sou set but maybe the same colour scheme as Sou himself or maybe even a slight redesign of a set but with a similar colour scheme? Maybe this could be seasonal or an event similar to the Rabbit corps, Maybe even requiring materials to "evolve" existing armors that you may already have or even dupes that you have.
