For those unfamiliar with the ways of TCGs and erratas, it means that although the card has been printed and is in hands around the world, we read the card as its new, altered version, not as it was originally printed
The Necrons are basically an army of robotic skeleton warriors, so putting them in black and making them artifact creatures makes a lot of sense
A spellslinger-storm deck comes to mind quickly, one that wins at instant speed by casting instants like Dark Ritual and Frantic Search to rip through your deck and generate immense sums of mana
The challenge, for Magic , is that the standard cards 15:11 aspect ratio doesnt lend itself to this kind of imagerywhich means, in turn, that its incredibly difficult for the set to capture the exact vibe it needs to capture
Its impossible to put onto paper
Its less efficient, but not by much, and you can curry favor with an opponent by giving them a card if youd rather pay less for the effect