Underrated cards

[LoveAlways]

I was just playing with the Dreamscape expansion and got Imaginative Matron (draw a card and discard one; unite with another enlightened hero and return a card from your discard pile to your hand). When I first started playing with this deck, I didn’t realize that if united, you get to take ANY card from your discard pile, not just the one discarded on the current turn.

Anyone want to chime in with cards they find underrated (apart from, obviously, low-rune cards with banishing ability)?