Wait for Menara Voidrender to complete the Orb of Noh'Orahil and then speak to her again.
I will get started immediately on crafting your orb and infusing your new demon into it. When done, you will have the choice of having it in the form of a staff or orb. I always felt it was important to cater to a warlock's chosen weapon... I see no reason not to continue that practice.
It is done, <name>. Simply tell me which you'd prefer: a staff that would require you to use both hands, or an orb so you may use a dagger or sword as your weapon.
Tackling the infernal was a great feat on your part and this reward will fit you nicely. I wish you further success in the arts, <name>.