mtg backup cards MTGNexus shuffle all but one of your hands into your library. 1x Backup Agent | FOIL

Flying (This creature can't be blocked except by creatures with flying or reach.) Attacking creatures you control get +1/+0

In terms of the decks themselves, each features both a Khan and a Dragon as the two face Commanders

None of them seem likely to produce some obnoxious corner case interaction that takes over Legacy, so chalk that up as back-to-back wins for the Universes Beyond team

This is why I suggest Guild Artisan as a possible pairing: it can give you up to four treasures a turn when Karlach attacks, which will let you power out some truly terrifying monsters

Unlike many ramp effects, it can grab any Forest, not just Basic ones - allowing it to dig up certain dual- and tri-lands - and still leaves behind a creature, albeit a small one