Cantrips like Crash Through are best in spellslinger and prowess decks (usually Izzet)
While the premium collector boosters guarantee at least 5 rares , play boosters have at most 4 rares, thus the price difference
It also makes bad board wipes like Make Obsolete, Suffocating Fumes, and Night Clubber a lot better, as they become cheap, one-sided wraths
Another example is the use of Pokmon with search abilities, like Jirachi Vs Dream Protector, which lets you look at the top 5 cards of your deck and attach any Energy card you find there to a Benched Pokmon
So he can make himself very dense, which makes himself extra strong, or he can make himself lose so much density he can actually pass between objects
Aristocrats decks are a trap