These cards come from all over Magic and have their own set symbol: Even rarer, these artifacts also come in a schematic art, still in the retro frame: Rarest of all, and one of the rarest promos ever printed in a Standard Legal set in Magics history, you can find serialized double-rainbow foil Schematic Arts in boosters as well
Iron Man If your money was on Tony Stark being a blue and red artifact-themed card, congratulations you were correct along with everyone else
Loxi: This is pretty silly in most token decks right
Any deck that cares about self-mill will have plenty of options for getting cards into the graveyard, with Sultai-based dredge decks able to capitalize most readily
However, it also highlighted a more significant issue
While I cant say theyre stronger than busted sacrifice-themed Jund commanders like Korvold, Fae-Cursed King or Prossh, Skyraider of Kher, Shattergang Brothers gets props for having a clear theme to build around