A Sacrosanct Chamber is a gathering of warrior wizards who specialise in wielding the energies of the tempest. The Evocators of the Cleansing Phalanxes invigorate their Sequitor allies with arcane lightning, while Hailstorm Batteries rain volleys of magically infused stormbolts into the thick of the foe. The Grand Convocation that leads the formation is empowered to new levels of potency by the intensity of the gathering celestial energies.
Celestial Fulcrum: At the head of a great host, a Lord-Arcanum finds the aetheric powers easy to command.
At the start of your hero phase, pick a LORD-ARCANUM from this battalion. That model can attempt to cast 1 additional spell in that hero phase.
The LORD-ARCANUM keyword is used in following Stormcast Eternals warscrolls: