Sometimes they miss and decide to never again try to push the design, like Splice and Devoid
And if you happen to have access to the original dual lands ( Dang, look at you, baller
Incapsula incident ID: 386000140117172151-286272691428787087
if you remember the "flip" cards of kami...these new double faced cards are just rip offs of that ability, designed to boost sales in WOTC sanctioned card sleeves, and extra "checklist" cards which im sure they will start selling on thier site, overall i agree 100%, they dropped the ball with this, if could have been so much more, but is nothing more then a rehashed "flip" thats been geared toward product sales
X Speed can also help both Mew ex and Koffing retreat for free, which will be a bit more energy efficient than picking them back up
If you mean 'challenging' other characters, or glimmers, in play Steel and Ruby are good at challenging and can get benefits for banishing opposing characters during challenges