Seer

The Seer is a moth found in the Resting Grounds. She brings The Knight back to her house after they are brought into the Dream Realm by the Dreamers.

She grants the Knight the Dream Nail, which grants access into the dreams of NPCs and enemies along with other abilities. She then urges the Knight to go and collect as much Essence as possible in order to fully awaken the Dream Nail.

Trivia
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 * It is implied that the moth ghost who guides the Knight out of the Dream Realm is the Seer, projected into the Dream Realm through unknown means.
 * The journal entry for Nightmare King is a poem by the Seer.