Find putrid bat wings in the basement of the Lighthaven Temple.

To do this, kill Undead Bats, or look on the ground.

Meet at the Lighthaven Tower of the Magi.

Say work then ingredient then bat wings to Uranos.

If Uranos already tells you that he has such wings, wait ten minutes, and try to give him again

 * 2,500 XP
 * Skull dagger