If the result is 1-14, you get to create a token of the Creature that isnt legendary, is tapped and attacking, and that gets exiled at the end of combat
The former allows its controller to kill its own units to make it stronger, while the latter forces everyone at the table to sacrifice a creature
A mana rock that eventually becomes an extra Emeria, the Sky Ruin
I think the biggest issue a lot of these background commanders have is that, even when paired with a great background, simply execute strategies that already exist but in a worse fashion
The scanner page shows how it works, and every card it finds links to a live price page on this site.
Its quite unlike most Lightning-type cards, too, because its relatively slow to set up and requires a large amount of energy with very few methods to accelerate that, so it can be a great long-play backup strategy in a faster deck like Pikachu ex