Dragon Priest Staff (Wall of Lightning)

There are three versions of the Dragon Priest Staff in. Each one of them resembling one of the three wall spells.

Acquisition
The Dragon priest staff is found during the main quest The World-Eater's Eyrie on the Dragon priest Nahkriin (Vengence.) It is used to open up the Portal into Sovngarde in order to get help and defeat Alduin. Considering that this weapon acts as a key to sovngarde you can not take it from Skuldafn where it orginally resides in. This is not true. To obtain the staff run up to Nahkriin before he picks up the staff and get his health very low. After he picks it up quickly kill him and loot his body(do not forget to grab both the mask and the staff as this is the only chance you have to get them). The gate to Sovngarde should still be open, and if you did it right you should be right next to the portal. Quickly jump in and enjoy your new "unobtainable" staff. (Note: Save before attacking Nahkriin as this may take a few tries, especially with weaker weapons). If The World-Eater's Eyrie was completed, the staff can be obtained by entering the console command "player.additem 0004de5b 1".