William Black is the father of Reginald Black and a fellow priest of Sirius. He told him tales of Rygax's adventures in the Shadowfel, but disappeared suddenly when Black Jr was still a child.

He has recently been rediscovered as one of Swayne's prisoners within Mount Pillar. He had been kept imprisoned there for many years (possibly ever since his abduction), constantly forced to watch disturbing visions of the local Grisgol's tragic life, which rendered him catatonic. However, he recovered to an extent when he saw his son, although it took a little while for him to believe that he wasn't an illusion.

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