These are hard plastic shells that you can slide an individual card into to keep it safe from liquids, dents, or curling (foil curling is a big problem with Magic cards printed in the last few years)
WB is a very parasitic A/B archetype, where sometimes you have Student of Ojutai and Ajani`s Pridemate awkwardly being horrible together, while other times you have a Tavern Swindler buying you free dragons with Angelic Accord
It gets even better when partnered with Armix, Filigree Thrasher or Glacian, Powerstone Engineer
Black Rares Mind Twist $200/$125 Royal Assassin $200/$125 Zombie Master $200/$100 Word of Command $150/$100 Deathlace $120/$60 Demonic Hordes $120/$70 Lich $120/$70 Lord of the Pit $100/$60 Bad Moon $100/$60 Contract from Below $100/$60 Nether Shadow $100/$50 Will-o-the-Wisp $100/$60 Nightmare $100/$60 ALL OTHER BLACK RARES $80/~$40 I think Mind Twist has a chance to grow a little moreits a degenerate card in Cube, making it more desirable than either of the other two black cards that retail at $200
In ZNR , this showcase style is featured mostly on non-legendary creatures, giving those creatures a way to shine on the battlefield and letting you enter the plane of Zendikar
