Granted, it's tapped Treasure, and it's gated to once per turn, but that's only fair given you can convert your stash of Treasure tokens into 4/4 fliers with haste
They know how to buy and sell their cards to other collectors and they know the market value of their slabs
Unless it has the read ahead ability found on some Saga cards in the Dominaria United set, it also won't enter the battlefield with any counters
That means that your Puresteel friend proffers a nasty batch of card-drawing good times to fans of White and Knights
The biggest thing is that, despite being a straight-to-Modern set like the two Modern Horizons, it will have a lower power level
Knight of the White Orchid was the gold standard for white mana ramp for a long time, and it has only recently had challenges from cards like Loyal Warhound and Cartogropher's Hawk