wild and free card sleeves Dragon Shield mark at the bottom A Wild Venture - Sleeves

6 Bitterbloom Bearer A 1/1 that costs two black mana, Bitterbloom Bearer has flash and flying

The Pokmon...Regular price $91.00 USDSale price $91.00 USD Regular priceUnit price per $102.00 USD Sold out Pokmon TCG: Mega EvolutionAscended Heroes Premium Poster Collection (Mega Gardevoir ex) Decorate Your Space and Power Up Your Deck with Mega Gardevoir ex

16/111 Togetic (Holo)

Id say another key feature is how lightweight and compatible it is with all kinds of hardware

Here's the Cube over at CubeCobra

Alpha Brawl, Spectacular Showdown, Massive Raid, these all share that flavor space (and I wish I could come up with some non-red examples off the top of my head)