How do you upgrade the wind staff on black ops 2 zombies?

To upgrade the Wind Staff in Call of Duty: Black Ops 2 Zombies on the map Origins, you need to complete several steps. First, collect the Wind Staff parts and build the staff at the excavation site. Next, you must charge the staff by killing zombies in front of the wind generator near the spawn area to fill it with souls. Finally, place the staff in the pedestal located in the church, and complete the corresponding challenge to upgrade the Wind Staff to its more powerful version.