Trial of St. Jiub

Destroy all creatures with flying.
"The battle lasted two full days. I was beaten, clawed, bitten and knocked down more times than I care to remember. In the end, seventy-six cliff racers were slaughtered. I was knee-deep in their corpses and my
body on the verge of collapse. But I had survived. I
smiled to the heavens and all went black."
— Jiub, The Rise and Fall of Saint Jiub the Eradicator, Hero of Morrowind, and Savior of
the Dunmer