mtg showcase cards legal Showcase: Outlaws of Thunder Junction The Gathering Art Discussion: Normal v. Showcase

It would appear that Draft Boosters and Set Boosters can have both foils and nonfoils of Showcase or Borderless treatments, but no Extended Art at all

Wizards Website (Secret Lairs) I give a quick mention to Secret Lairs, which you can buy directly from WotC

WPN (May 26, 2020)

The brown colour denoting monster cards was replaced by the red, blue and yellow backing associated with Slifer, Obelisk and Ra respectively

There's nothing inherently superior to Mox Jet over Mox Sapphireit simply provides a black mana as opposed to a blue mana

Rem Karolus addresses this issue head-on, preventing all damage that such spells would deal to creatures you control while hes in play