Ibn Naggazar was a brilliant, if somewhat maniacal, Arabyan sorcerer. Whilst it is unknown whether his madness sprang from isolation, too many attempt at creating intoxicating 'elixirs' or the honeyed promises of whispering Daemons, there can be no doubt that he was utterly insane. No rational wizard would create a book inked on the skin of his closest family, much less constantly follow its advice.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
Black Book of Ibn NaggazarURL Copied!
The Black Book grants Jaffar the Loremaster special rule. In addition, whenever Jaffar attempt to casts a spell, he must make a blood sacrifice roll to see the number of victims claimed by the book. Roll a D3 – remove this number of models from the caster's unit as casualties, and add this many dice to his casting attempt. If there are insufficient 'volunteers' for the sacrifice, Jaffar is also dragged into the book – he and his unit are removed as casualties and the spell automatically fails. No saves of any kind can be taken by models claimed by the book. If Jaffar has not attempted to cast a spell at the end of each of his Magic phases, he is devoured by the Daemons within the book and is removed as a casualty.