The ritual is now concluded. If you ever need another necromantic ritual performed, you know who to talk to.

Excellent. Now, if you would, please follow me.

I can't begin the ritual until I have them.

Do you have the ritual components and my payment for me?

Not until you pay me the compensation.

Yes, and for that ritual I will need some components. Please bring me a black rose and some gravedust. I know for a fact that these objects can be found for sale at the shops of the local alchemists and herbalists and such. Oh, and of course, a small fee of 300 septims. And obviously don't forget to bring the gem itself. Once you have all of that, talk to me again, and you will be talking to Missa Rhyle in no time.