The rules for fielding Astromancers, Crane Gun Teams, Iron Hail Gunners, and Peasant Levy in your games of Warhammer: The Old World can be found in Arcane Journal: The Breaching of the Great Bastion.
This essential supplement dives deep into the lore of Grand Cathay and the storied Land of Dragons, exploring how its people unite to defend the Great Bastion from relentless invaders. It even includes full rules to recreate the legendary Battle of Nan-Li on the tabletop letting you refight one of Cathays most pivotal conflicts yourself.