Ojutai, Soul of Winter [Dragon]: Was occasionally useful when it was in standard
And if that's not flashy enough, there are Collector's Edition versions where every card gets the Surge Foil treatment because we all know shiny cardboard is the real endgame
This is the information you know is definitely going to be relevant this game, and should inform a lot about if you want to make a trade or not
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
Mechanics in the style of defender have been in the game since Alpha, when the Wall creature type was introduced