mtg murder at karlov manor card list Mirko, Obsessive Theorist [Murders Commander] Murder | Murders at Karlov

New players and random casual players seem unlikely to spend $10 on one booster when they could be buying several cheaper boosters (or some sort of preconstructed deck product) for around the same price

This is probably best paired with discard and sacrifice effects to constrain opponents access to resources to sacrifice

While Collector Boosters contain Booster Fun treatments, extended-art versions, traditional foil, and surge foil variants of the cards from the Commander Decks, they also have a handful of reprints with special treatments only found in Collector Boosters

The bigness

Double Down is great for copying all the non-legendary pirates