Instead of a dice there's the comical sounding "chaos bag" which contains a mix of counters specified by the scenario
We also get to see Alesha, who was introduced as one of Magics first trans characters in the Khans of Tarkir story, later in her life guiding the next generation in Alesha, Who Smiles at Death: You can read about the stories behind Collective Voyage, Mana Confluence, Sol Ring, and Triumphant Reckoning in Wizards announcement
Your best option to do that is by completing Battle Tasks or participating in limited-time events
With flying, trample, and haste, it comes out swinging right away, and when it connects, you draw cards and pile on +1/+1 counters equal to the number of different permanent types in your graveyard, turning every sacrifice into fuel for both power and card advantage
These events teach you the basics of playing the game and how to build a deck of your own