card sleeves art MTG 100CT (Crimson Black Lotus), Matte Card Sleeves, Matte Back & Clear Front, 66x92mm : Toys & Games textured matte surface that provides a smooth shuffling experience and maximized image quality Red Collection - Card Sleeves

If you do a good job drafting Sultai Delve, these features will exist no matter what individual cards you wind up with

Also similar to lands, one of the big reasons that Commander 2018 was so poorly received is that the decks were severely lacking in good colorless cards (in fact, for half of the 2018 decks, the only colorless card worth mentioning was Sol Ring, which has been in every Commander deck since the start of the series)

These have their own 'K' rarity, it's very likely (not confirmed) the 'K' refers to Kagayaku Pokemon, it's how these Radiant Pokemon cards are called in Japanese

Better yet, the first time it dies, it comes back as a 2/2 rather than a 1/1

Dont let that stop you from trying them out though