After the Plague Forest decayed due to the plague, the soil became very barren. Romeo grabbed a handful of dirt and let it run through his fingers.
The Gnarled Treant absorbed any nutrition left in the soil and released a poisonous liquid.
Once the soil loses all its nutrients, it is difficult to recover it, so we must stop these Gnarled Treant!
You'll find the Treants outside the city area.