Forgotten Crossroads

Description
The Forgotten Crossroads is the second area explored after King's Pass. It acts as a central hub to several other areas, including: Dirtmouth, Greenpath, Fungal Wastes, City of Tears, Resting Grounds and Crystal Peak. Several NPCs can be encountered here, including: Salubra, Cornifer, Sly, The Snail Shaman and the Grubfather. The boss of the Forgotten Crossroads is the False Knight.

Infected Crossroads
Infection will have spread through the area, similar to the area leading up to the Broken Vessel boss fight, making navigation much more difficult and even closing off certain shortcuts formerly available in the uninfected Crossroads. In addition, stronger enemies will replace most early-game enemies formerly found in the uninfected Crossroads.

It is not clear what triggers the Infected Crossroad, there seems to be multiple triggers (Needs more clarification):
 * After killing one of the Dreamers.
 * After killing the Broken Vessel.
 * Other?