After becoming a $1 rare due to almost all casual demand alone, Assault Formation’s stock took a major hit when it was revealed that Assault Formation would be reprinted in Iconic Masters. Not only that, its rarity was downgraded from rare to uncommon!
Foil copies of Assault Formation weren’t safe either! Holding steady for a long time at around $3, this card seemed like a safe bet to stash away in foil. But not only is Iconic Masters a set that comes with a foil card in every pack, but becoming uncommon now means tons of new foil copies hitting the market. This means those Dragons of Tarkir set foils are no longer safe investments.
However, there is a good thing that comes out of this. Because it was included in the Iconic Masters to enable a certain draft strategy, Assault Formation gets new exposure. As a card you really need four copies of in a 60-card deck, having a bunch of new copies actually isn’t as much of a problem as you may at first think. Sure, the price of all versions of this card will plummet, but they will rebound eventually.
This is a card that already sees a bunch of measureable play in a number of Commander decks, chiefly Doran the Siege Tower, Ishkanah, Grafwidow, and Sapling of Colfenor. Because this is a card that can only get better with time as more high-toughness creatures are printed, copies of Assault Formation from Iconic Masters are a great long-term hold.
As for existing Dragons of Tarkir versions, it doesn’t make much sense to panic sell them, since it seems people are simply holding them. The short-term value will definitely take a hit, but since this is a card with some demand, long-term it should keep its status as a solid casual hit with plenty of future upside.