|My first D&D book was the 2e Monstrous Manual, whence|
this image is take; it's still my favorite depiction of a gnoll
|Gnolls draw dicks on everything ... and then build dick-idols!|
|On the left, a hyena penis; on the right, a hyena female's pseudo-penis|
Seeing this mockery of Lawful and Good religious rites, presided over by an ass, the gnolls fall among themselves laughing horribly into the night. They demand ever more elaborate "rites" and protestations of faith from the slaves/prisoners they wish to abuse by forcing them to take part in these abominations of religious ritual; whether the "rites" end up killing the slave(s), or the gnolls find the joke good enough to spare their slave(s) for the night is up to the whim of the gnolls and whether they can control themselves amidst their fits of laughter. (Once the mockery gets going and the gnolls begin really to laugh themselves wild, they should make a saving throw against paralysis at +2 each round to act; otherwise they continue to laugh uproariously, pounding the ground in their perverse mirth, though still able to defend themselves ably if attacked).