In fact, unlike other online TCGs, there's not even a way to break down your cards into crafting materials or in-game currency in Arena, to turn the playing pieces you don't want into others that you do
This isnt like a Kaladesh Sol Ring, Mana Crypt, Mana Vault, or Lotus Petal where you can show these off
There are no shortage of Clues in the format, and even giving up a full card for the bolt effect is going to be worthwhile a big chunk of the time
Many events have unique Game Mats, exclusive to these Public Events
Worldwalker Helm Worldwalker Helm is the only non-Ixalan Map card printed thus far (though the art suggests it might have originated from Ixalan before making its way into the vault at Thunder Junction), which is pretty funny because its among the strongest