While at MagicCon Vegas in late September this year, I spoke with Mike Turian, product architect for Magic (though his role while M21 was in design was principal product designer, according to his LinkedIn), and he confirmed that for M21 the design for showcase cards was intended to keep the text boxes clean and uncluttered, kind of like you would see in simple but powerful spells with only a few words on them, like Wrath of God or Counterspell
Lands don't cost any mana, but you can usually only play one a turn, and like other MTG card types, you can only play them at Sorcery speed
However, they explain: "I've always stated I would respect such a request, and I plan to keep my word and will not grasp at technicalities." Pixelborn has been around for just over a year - and actually arrived shortly before any physical Disney Lorcana cards were available to buy
Number Six Our top scoring Mono-Black dork is this 3-drop triple Black 2/3 dork
Planeswalkers Considering that, by definition, planeswalkers are Mythic Rares, they get a pass as far as the "tournament-level card" criteria