Horn Heads

You ain't Mork and ya ain't Gork neither. Well, I ain't got long so you listen 'ere. Dem beastymen killed some of da boyz and 'et them. Den dey used wot blood was left to do some kinds o' magic dat made a bunch o' da boyz sick. Dere was two of em wot done dis to us. One o' dem was a big magic beastyman, bigger than da one you kilt here. Da other was a big-un for sure. Dey had a humie wif' em telling 'em what to do. Dey is tryin' to make da boyz sick so dere ain't no more Waaagh! So you best kill da lot of 'em first before dey kill youse.

From Mulk, travel to the far northwest of the Plagueforest. Search for and kill Grrlac and Khargon, the Beastmen that plot against the Bloody Sun Boyz. Be sure to examine anything you might find on Khargon's corpse. To do so, use the item in your backpack.