The Dryad has many options for you to cure any of the assimilation effects. She can directly purify you for a price and sells the Cleansing Station and Mojo Flasks after you complete some of her quests to cleanse a little of the world evil. Furthermore, you can also throw a Nature’s Gift into Shimmer to get the Mojo Injection and permanently have assimilation reduction over time.

If you’d rather not deal with assimilation, there is an option to toggle it on and off in the Mod Configuration menu.