Priestess A'moora wants you to place Lady Sathrah's silvery spinnerets at the fountain inside the temple, and then return to her.
Now you must finish the task to which you have been appointed. Take the spinnerets and offer Lady Sathrah's sacrifice to Elune; lay the great spider to rest.
Inside this temple, find the central fountain. There is where you may leave the sacrifice. The holy waters will purify and cleanse the corruption that drove Sathrah mad.
When you have completed this, return to me.