It's a card with black-and-white artwork printed as a traditional foil using a special silver substrate, then finished with a glossy varnish like the showcase eternal night cards you already know from Innistrad: Midnight Hunt and Innistrad: Crimson Vow
In mono-red, the key to success is to find the strategy that works best for you and your play style
Which cards in the maybeboard should I add, which should replace similar ones, and which won't fit in
The two are on opposite spectrums, and both with massive followings that crossover with Magic players
As a result, there's no shortage of awesome cards to talk about that have impacted everything from Standard to Vintage to Commander and beyond
A Showcase variant, its another card which is also enhanced by the fracture foil treatment