Kaladesh is a plane where natural mages are rare. Work that would be done with magic on other planes is instead accomplished through devices. The automatons, thopters, and other artifact creatures of the plane are fueled by aether. Artifacts are built as much for beauty as for function. Fire magic is strictly banned, and pyromancy punishable with a death sentence. Chandra returns to Kaladesh and saves her mother from her nemesis Baral. Along the way, The Gatewatch unexpectedly is confronted by the scheming Tezzeret.