How do you get to the dormant well of souls after avatar game?

It seems you're referring to the Dormant Well of Souls from the Avatar: The Last Airbender universe. However, there isn't a physical location like this in the game "Avatar: The Last Airbender" that you're likely referring to.

Here's what we can clarify:

* The Dormant Well of Souls is a location mentioned in the Avatar: The Last Airbender animated series, specifically in the episode "The Spirit World." It's a place in the Spirit World where souls go after death.

* The "Avatar" game could refer to a number of games based on the Avatar franchise. There's a popular one from Nickelodeon called Avatar: The Last Airbender (2006).

* There's no way to access the Dormant Well of Souls in any of the games. It's a location purely in the show's lore, not a gameplay mechanic.

Perhaps you're thinking of a different game or have a different idea in mind. Please let me know if you can provide more information about where you're getting this information, and I'll do my best to help!