Krark-Clan Ironworks The KCI deck had one very key weakness when it was around in Modern: it was extremely difficult to play
While it's certainly possible to get lucky and double your money with a box of Masters 25 even at current box prices, which are around $180$190if your goal is to build a Modern collection, you're probably better off spending your money on newly cheap Thalias, Eidolon of the Great Revels, Blood Moons, Utopia Sprawls, and the like
This can come in handy with creatures like Orcish Bowmasters
Brimaz, Blight of Oreskos is a true Phrexian now, creating Incubator tokens anytime you cast a Phyrexian or artifact spell
Where do the assassins from ACR and Marvel Super Heroes rank as commanders, compared to the rest of the Magic meta
Jawbone Duelist Toxic and double strike is a combo of abilities begging you to be creative