X Pokmon, which well look at in a moment, and they have a sideways orientation with artwork spreading across two cards
Plenty of players love those old borders, making them a collector's piece over the years
If the cards are inexpensive (say, under $20), simply slip those top loaders or team bags into a padded envelope for shipping
UniVersus has been around in one form or another since 2006 (not quite as long as MTG of course, which first launched over thirty years ago, in 1993!), and allows players to use characters from wildly different series, taking on opponents in one on one battles, reminiscent of the combo heavy style of arcade fighting games
I used those to narrow the field down to sixteen contestants, then down to eight from there