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The Realmgate Wars: Volume 1

The Age of Chaos has been long and dark. The Mortal Realms are a brutal place, their people consigned to slavery and terror. But now a light has come. A storm breaks, and the God-King Sigmar's celestial armies arrive to liberate the Realms. The Realmgate Wars have begun.
Age of Sigmar
anthology

It contains:
Pantheon
Hammers of Sigmar
War Storm
The Gates of Azyr
Wardens of the Everqueen
Ghal Maraz
Black Rift

Also in:
The Complete Realmgate Wars Collection