Publisher's description:
Hero's Call is an epic supplement for Warhammer Fantasy Roleplay that takes your campaign to the peaks of power! Heroes gain tremendous new ammunition to face the challenges rising against them, including new high-powered careers, regional options for men and dwarfs from outside Reikland, two new player races, action cards for each new trait, and spells and blessings for Ranks 4 and 5.
Players are going to need to take advantage of all these thrilling new powers, too, because Hero's Call gives GMs exciting new ways to challenge high-powered parties, with tips for addressing their fame or infamy, guidelines for running notable adversaries, such as Archaon the Everchosen, and a complete adventure, The Art of Waaagh!
Rise above the ordinary when you answer the Hero's Call.

From the box:
All soothsayers and doomspeakers agree: the end times are at hand. Perils more deadly than ever before threaten the Empire; Chaos warlords of unprecedented power and skill, monsters of enormous size and unnatural appetites, and evil masterminds from within the Empire's own borders. It is a grim time of dangers... and heroes.
Hero's Call is crammed full of new options for Warhammer Fantasy Roleplay heroes and GMs alike. A dozen new careers and a host of new action cards, talents, and new rules, Hero's Call brings the Warhammer Fantasy Roleplay experience up to its ultimate level, covering Rank 4 and Rank 5 play. Players can choose from over a dozen new regional options for human and dwarf characters, brand new ogre and halfling rules, and Rank 4 and Rank 5 spells and blessings for all orders and faiths.
Game Masters will find new and fearsome enemies, including Archaon, the Lord of the End Times, to threaten their heroes with. New Epic Threat sheets can transform even the humblest monster into a dangerous enemy. And in the Grey Mountains, Washnack Gorejaw has learned the art of Waaagh!
Will you answer the hero's call?