[not much spoiling] is there a reward for fighting the dreamers?

So far, I have "access" to one. In deepnest, distant village; the area I got trapped in supposedly should have a dreamer there - or nearby at least - if I go back and explore more. (I escaped a while back).

But I'm trying to focus on doing stuff that'll make me stronger, like abilities, ore, charms, charm notches, etc.

In terms of where I am:

• I got the "kings mark" from the girl
• I beat the first stage of the collosium
• I started the first part of Grimms quest. Like, I've collected three fires so far, the pet grew, and he asked for three more.
• I've unlocked up to 900 dream essence (the gates)