

However, one of the safer routes that can be taken is to go through the Forgotten Crossroads using the tram (this will not destroy the flower) and then head towards the elevator connecting to Fungal Wastes. No route is truly safe, with each having its own flavor of threats along the way. This is no easy feat, as it requires you to take no damage from one end of Hallownest all the way to the other without any form of fast travel. The bosses that can be rematched in this way are the False Knight, Broken Vessel, Soul Master, and the Dung Defender. These fights are much more difficult than their original fight, but also award the most essence of the three options. Finally, Dream Bosses are rematches against specific bosses that you have defeated that can be accessed by using the dream nail on their corpse. Iselda in Dirtmouth sells a pin that will mark Warrior dreams you have found, allowing them to be found much easier.

Warrior Dreams can be found all throughout Hallownest, serving as boss fights and rewarding large amounts of essence upon their defeat. Whispering roots can be struck by the Dream Nail to cause essence to appear throughout an area, allowing you to collect it by platforming. Essence can be acquired through whispering roots, Warrior Dreams, and Dream Bosses found throughout Hallownest. After collecting 1500 essence and talking to her again, you will be rewarded with a mask shard. She will give you the Dream Nail, and task you with collecting dream essence for it. As you progress through the story you will find the Resting Grounds, and after some exploration in the small area, you will find the Seer.
