If you do need another card, or want to skip the revealing part, discarding a Vault of Whispers and sacrificing a Dockside Chef puts the necessary card types in your graveyard, and puts Demonic Counsel right in line with Demonic Tutor
The combo is built around the non-green nephilim, Yore-Tiller Nephilim, Medomai the Ageless, and Viscera Seer (or any creature with a sacrifice a creature ability)
The story of Reis and Beowulf is very similar to that of Ladyhawke
While the first-ever Iconic cards are, understandably, fetching sizeable fees, plenty of the other "Enchanted" cards are also reaching hundreds of dollars already, and are definitely worth chasing as well
And, of course, the movies are immensely popular as well
Two mana is dirt cheap for potentially not dying to a combo or a creature that would be otherwise too big for you to handle