When it comes into play, it also tries to give you a land and some stuff to recur as well
Whether you use one of the commanders from Ikoria: Lair of Behemoths or a commander that can be built into a mutate deck like Ivy, Gleeful Spellthief or Ramos, Dragon Engine, go out there and make David Cronenberg proud
In my extensive testing I have found the mirror to mostly be about getting ahead and staying ahead
Kenrith, the Returned King has been a bomb card in multiple formats, whether as a potent 5-color commander or back when it was a key part of Fires of Invention decks
Not every deck wants this, but its firmly playable, especially if youre wanting to use Domain
My advice: assume proxies are effectively made to order, and treat replacements/credits for print defects as the realistic outcome