You can't cast the cards you drew to avoid having two cards to choose.
People playing with Mega Evolution cards in the mobile app get inspired to chase physical versions, driving secondary market demand higher
The closest I could find to anybody doing it in the mainstream recently was Artifact (I know, I know, I'm stretching the word "mainstream" here) with a slightly bastardised version of the concept handled via Steam's marketplace, and even then it's still an online auction house, not just doing fun swaps with your pals and saying "well I've got this, what've you got?", like exchanging the best parts of your packed lunches at school
R Rare Ghostrick Alucard X DARK Rank 3 [ ZombieXyzEffect ] ATK 1800 DEF 1600 2 Level 3 monsters Monsters your opponent controls cannot target face-up "Ghostrick" monsters, or any face-down Defense Position monsters, for attacks, except this one
While her Full Art card showed off her playfulness, Miriams Alt Art card shows off her clumsier side, as he fumbles with a large stack of papers
