There are 5 totems in total, corresponding to the suburbs of 5 towns. Each totem is guarded by a BOSS. You can find it by carefully looking for the first scene of each exit of the town. After destroying all the totems, go back to Huan Yu and learn that you need the Black Queen's Orb to track Rhodes. 
Go back to the west of Emerald Town and find a man in robes. He will tell you the whereabouts of the orb. There is a certain chance of getting it by defeating the BOSS in the Cave of the Dead in Luofeng Valley, south of Emerald Town. 
When you return to Phantom Rain and open the portal, Rhodes is at the bottom of the different space. Defeat him and the game will come to an end. After completing the main storyline, you can continue to play the game. You can go to the guild to challenge the ultimate BOSS and the 10-consecutive battle mode, which is still very challenging. 