They admitted after it was a mistake, but they trusted in my decision without making one for themselves
Arcane Proxy feels like less of a standout bomb than most of the cards on this list, but it's one of those build-arounds where you barely have to put effort in to make it good, and so 98 out of 98 players first picked it
It doesn't frequently get to top level but more than you would think, and when it gets there it is really hard to lose
This lets White make the most out of the creatures it does have, and it can try to leverage its strong removal to get in hits as well
Getting another copy of Garruks Packleader, Indrik Stomphowler, or even just good old Rampaging Baloths (two landfall triggers!) is exceptional value
Opponents won't lose life even if you control eight or more artifacts