The fairest trade possible would be an even exchange, like $5 worth of cards for $5 worth of cards, even if that means one player trades a single $5 card for two cards that cost $2.50 each
Besides its own impressive statline and relevant combat abilities, I love that its assassin-creation ability doesnt specify one or more, and instead chunks out a 1/1 Assassin creature for each historic creature that dealt damage
He's a big fan of Magic: The Gathering and other collectible card games, much to his wife's dismay.
With the change in 2025 adding more Universes Beyond sets to the normal Standard rotation, it's likely we'll see D&D pop up again to fill in a future set
Note if you aren't playing creatures yourself, and don't have any Lingering Souls lying around, Night of Souls' Betrayal is a cheaper replacement for Curse that works just as well