General Casual Format: Kid Pleaser

Blitz looks like the one that prompted them to make these, and the other 4 seems like various ways to make "opening an unexciting pack a little less dull" (by either hiding information about the pack for an extended period of time, or by making you carefully consider each card individually).

I only open packs anymore for sealed or draft so none of this matters to me, but nice to see them at least making the attempt!