Hammerhal, the Twin-Tailed city has long stood between the realms of Fire and Life; a beacon of the God-King Sigmars righteous glory. However, in the wake of the Shyish Necroquake dark magic permeates the realms and Hammerhal sits on the brink of war.

In Onslaught, 128 new cards mean that each Grand Alliance will be bolstered with new champions, blessings, units, spells, abilities and now Realm Magic. With the addition of this new set of cards, bold strategies will emerge, and existing tactics will evolve.