One of the earliest nightmares I ever had as a kid was about a Jack in the Box, which I still remember fondly
Most Standard decks already run a decent creature count, but the desire to protect opposing Battles (or should I say Sieges) will potentially raise the average and thats before you consider how many decks might want to run Battles of their own
Ive heard anecdotally that there are around 3 million collector boosters printed for an average set (although special sets can have more)
It has multiple synergies with aggressive artifact decks
The group of decks all had specific names and included Arcane Maelstrom, Enhanced Evolution, Ruthless Regiment, Symbiotic Swarm, and Timeless Wisdom
Its not super-exciting, as you frequently want your sideboard interaction to be streamlined and efficient, particularly when combating problematic artifacts and enchantments