Online:The First Step

Quick Walkthrough
# Talk to Kauzanabi-jo inside Rawl'kha Temple.
# Watch the ceremony.
# Drink the Moon-Sugar Elixir.
# Talk to Shazah, or talk to Khali.
# Walk the path with the Lunar Champion.
# Walk the path with the next Lunar Champion.
# Talk to Kauzanabi-jo.
# Observe the ritual.
# Talk to Kauzanabi-jo.

Detailed Walkthrough
Talk to Hadam-do in Rawl'kha. He says that as the Moon-Hallowed, you are expected inside the Rawl'kha Temple. Enter the temple. You have the opportunity to speak with the Dominion elite before proceeding with the ritual. The Green Lady says the Wood Elves are deeply divided, so much so that she believes the Dominion is at its most vulnerable. Queen Ayrenn says the High Elves are cautious, but she says the Summerset Isles will continue to support Elsweyr. Mane Akkhuz-ri says he can never atone for his deeds, and he says he is Mane no longer. Lord Gharesh-ri says the Khajiit are talking about the situation with the Mane and two potential candidates. 

When you're ready, speak with Kauzanabi-jo about the ritual. You can ask her questions about it, if you want. You will drink an elixir to make you "more receptive to the touch of Jone and Jode" and then follow the Lunar Champions.  Listen to Kauzanabi-jo as she invites the Lunar Champions to drink the elixir:
:"We have gathered here to usher the Champions onto the next path. The trial path. These three cups contain moon-sugar elixir, a sacred potion. They will allow the light of the moons into your souls. Champions, step forth and drink the elixir. The third cup is for the Moon Hallowed, who will walk with the Champions on their path."

Now it's your turn. Drink the Moon-Sugar Elixir from the center cup on the table. After you drink the elixir, you need to pick the Lunar Champion you wish to observe. You will be walking the path with both of them, this choice is simply who you are going to walk it with first.

Shazah's Path
Follow Shazah into the temple portal behind her. She notices there are zombies littering the area. She believes they are victims of the Knahaten Flu, whom her father worked to cure. She was always afraid of the flu victims as a child.

Fight through the nightmarish flu victims to get to the next part of the temple. You do not have to kill all of them. The door to the next room is to the south. In the next room, watch as Shazah greets her father Ubraz. He will be her guide on the path. He tells you to pray at the shrines in the room to learn more of the past. There are three shrines representing different phases of the moon: Full, Waxing and Waning. You have to wait for each vision to end in order to use another shrine.

The three visions show Ubraz, Shazah's father, trying to cure the flu, but eventually failing and succumbing to the plague himself. Ask Shazah if she is ready to continue, then enter the next room. 

There are three waves of enemies to defeat in the center of the room. Each wave has more than the previous. Once all of the Flu victims are dead, talk to Shazah in front of the northern door. She knew the people from the visions. They worked with her father, and one was her cook. She realizes that she must be brave like her sister. Enter the portal that appears to completes Shazah's trial.

Khali's Path
Talk to Khali, then enter the portal behind her. Cut your way through the Colovians that are in your way, then enter the next room through the door to the right.

Khali's mother, Namu appears. She is Khali's guide on the path. Namu tells you to use the three shrines in the room and watch the visions they show you. Use the three Moon Shrines and watch the visions. Each tells the story of Khali's mother and her efforts against the resistance. The final vision shows her death at the hands of Colovian General Quintilius. Talk to Khali after you use all three shrines. You will need to defeat General Quintilius, then speak to Khali again. She realizes that she fights to protect those she cares for. Follow her through the portal into the Temple Sanctuary.

Once you return, speak with to Kauzanabi-jo. There is one more step to the ceremony: the final cleansing. Watch the ritual, then speak to her again for your reward.
  
Quest Stages