There are several unique resources that you can find while exploring Hades 2, and they all bring you one step closer to defeating Chronos. One of the more difficult resources to find is Thalamus, a unique plant that grows in chaotic areas.
Hades 2 – Where to find Thalamus – Unraveling a Fateful Bond – How to stop losing health on the surface
Like the other plants you find in Hades 2, Thalamus appears in a specific area and you have to do everything you can to discover it. You won't be able to find it right away and it takes a fair amount of time to unlock it. There are several things you have to do before Thalamus starts appearing in your game.
Thalamus is a plant that grows in Chaos in Hades 2. While it's unlikely you'll encounter it when visiting Chaos, it will also grow from Origin Seeds, which you can get from Chaos.
There are a few things you need to do before you reach this point, however. Thalamus is initially required to complete the Unraveling a Fateful Bond spell at the Cauldron. You will receive this spell shortly after your first trip to the surface and speaking with Moros. The only way to get to the surface is to complete the Family in Need fate and the Permeation of Witching Wards in Hades 2, which also requires you to find Shadow.