The Duel Commander rules committee banned four cards in the May 30 rules announcement.
Going forward, Shorikai, Genesis Engine, Bazaar of Baghdad, Ragavan, Nimble Pilferer, and Serra’s Sanctum are banned in Duel Commander. Duel Commander is a variant of Commander, sculpted for 1v1 play.
Shorikai is only banned as a Commander, due to the difficulty to interact with it in a competitive format without sideboards. Players can still use the Legendary Vehicle as part of their deck. Bazaar of Baghdad got the axe for two reasons. Firstly, it finally found a commander that pushed it over the edge in Rielle, the Everwise. Secondly, the availability of the card in paper makes it an easy card to remove from the format.
Ragavan is getting banned due to it being one of the best plays on Turn 1 and still being a relevant play late in the game. Serra’s Sanctum joins the ranks of Gaea’s Cradle and Tolarian Academy as cards that simply produce too much mana by tapping.
The next rules announcement for the format is set July 25.
Read the original announcement from the Duel Commander website.