Now, because this is Arcana, you may have already guessed that the actors are significant. In fact, they're acting out an important moment from the history of Ravnica. Let's look closer!
Do you recognize them?
It's Szadek, Lord of Secrets and Agrus Kos, Wojek Veteran, from the original Ravnica block! And they're fighting, which means this is probably the moment when Agrus Kos arrests Szadek, breaking the Guildpact!
You can see what it's like to watch this play in the Uncharter Realms article that previewed Thespian's Stage. And you can read the whole story of the original Ravnica Cycle in eBook form. More information is right here.