Mara Sov ( appropriate services only )
Other ( planet vendor I guess, state it in the comments!)
Roam the Ascendant Realm and learn from Toland. How to obtain the power of the Taken by defeating Savathûn. If you're not aware, Toland witnessed us defeat Oryx, but cursed us out for not taking his power. Hopefully we'll get the power to Take when we beat Savathûn through some type of artifact that Toland will instruct us to build.