At local game stores, like Stormcrow Games in Lubbock, there are limits set for how many packs individual buyers can purchase because they just run out so quickly
It's Unpreventable Just like a mob boss who bribes the cops to look the other way, some cards just ignore all the rules
Other decks that benefit from board wipes are those that accumulate value through non-creature means, like many enchantress or superfriends decks
Chromatic Star doesn't need to be used right away, allowing you to keep it on the battlefield to keep your affinity to artifact cards up
Of course, you still have to wait a whole turn cycle and ensure that your graveyard or Combat isn't removed, but Commander is for dreaming big, isn't it
While this seemed good on paper, the key here is that they didnt Mega Evolve from a Venusaur or Blastoise: they Mega Evolved from Blastoise-EX and Venusaur-EX