Because of this, it's a "buyer beware" error type
Elesh Norn's deck has some of the best ETB creatures and enchantments in white to use a stunning variety of effects to compete on any board state, and it doubles them all
Emerald and Rubys split ability to deal with opponents cards while working toward unleashing its own powerful characters makes it a deck that requires some practice to fully understand, needing some careful cardplay - and good luck - to overcome its less forgiving aspects
It may even prove that $10 ends up being a good deal for Inquisition of Kozilek once all is said and done
But once Oath of the Gatewatch came around a few years later and unleashed a bunch of still powerful but much cheaper Eldrazi, the card suddenly broke Modern during Eldrazi Winter, which only thawed once Eye was banned
Its a wide-reaching, if subtle, effect that could just knock the plans of your opponents off-kilter enough to give you the edge you need in your games of Commander