Your first chance to play Streets of New Capenna is during Prerelease events taking place April 22–28 at your local game store. At each Prerelease, you'll join a family, get their themed Prerelease Pack, then build a deck from the cards inside.
Each Prerelease Pack contains:
1 Family Booster containing a rare or mythic rare, 3 uncommons, 8 commons, and 2 lands from Streets of New Capenna matching your chosen family, plus 1 traditional foil rare or mythic rare from Streets of New Capenna with a year stamp
5 Streets of New Capenna Draft Boosters
1 20-sided spindown die
1 Reusable deck box with divider
1 MTG Arena code card