Bard$4
Types: Action, Fate
+$2. Receive a Boon.
Bard seems both weak and boring. Bard is boring because there are two more interesting terminal actions that also give coin(s) and a Boon (Tracker and Sacred Grove). Making it cost $3 instead of $4 would increase its power, but it would still be boring.
tastor suggested allowing Bard to choose one of the top two boons to receive. The basic idea seems good, though you'd probably want to discard the Boon not chosen. However, this change might make Bard too strong. A weaker alternative would be: "Look at the top card of the Boon deck. You may discard it. Then receive a Boon."
A bigger change to Bard would be to make it a source of +2 Actions (thematic with Wandering Minstrel). Nocturne could use another source of +Actions, because Cursed Village has bad synergy with the Night cards, and Conclave is hard to get many extra +Actions out of. A non-terminal action that gained a Boon on each play would take too long to resolve, so maybe something like:
Revised Bard$3
Types: Action, Fate
+$1. +2 Actions. If you do not have any other Bards in play (besides this), receive a Boon.
Another alternative is to make the card more like Crossroads as a limited +Actions effect (and in wording as well, as suggested by GendoIkari). Something like:
Alternate Bard$3
Types: Action, Fate
+$1. Receive a Boon. If this is the first time you played a Bard this turn, +2 Actions.