Fell callers are powerful trollkin warriors boasting voices capable of shattering stone and making the sky itself tremble, and Grissel Bloodsong has singular mastery of this ability. She wages a personal war against the enemies of the Trollbloods as an icon among her war-ravaged people. With her deafening hammer Resounder in hand, she serves as an inspiration on the battlefront, prompting even the battle-weary to resume the fight and follow her lead.