What’s a good way to build Historic Jeskai now that Brainstorm is banned?
First of all, Brainstorm was in no way a critical piece for control decks. In combo decks like Jeskai Taking Turns, it was really important to set up your draws and find the missing pieces, but it also filled the role of being able to put Velomachus Lorehold back into your deck if you drew it.
In Izzet Phoenix, you need as many cheap cantrips as possible. Brainstorm was great there to not only set up your draws, but also to chain together three instants and sorceries to bring back your Phoenixes.
In the first big post-Brainstorm Historic 5k tournament, there were four copies of Jeskai in the Top 8. You can check all the deck lists here. There was one thing they all had in common – they all played Magma Opus, Mizzix’s Mastery and Torrential Gearhulk! I picked this version from Arne Huschenbeth because I really like the build.