Gnolls celebrate their victories by performing demonic rituals and making blood offerings to Yeenoghu. Sometimes the demon lord rewards his worshipers by allowing one of them to be possessed by a demonic spirit. Marked as Yeenoghu's favourite, the lucky recipient becomes a fang of Yeenoghu, the chosen of the Gnoll Lord. In much the same way Yeenoghu created the first gnolls, a hyena that feasts on a fang's slain foe undergoes a horrible transformation, becoming a full- grown adult gnoll. Depending on the number of hyenas in a region, a fang of Yeenoghu can lead to a startling increase in the gnoll population. Finding and killing the fang is the only way to keep that population in check.
