Location: April Rares 2016 - Game Menu
Price: 5,000 Gold
Sellback: 1,250 Gold
Rarity: Rare Rarity
Description: To take control of the ravens, one must assimilate with them. Their king and queen have done this when they came to power as a gesture of respect and absolute power.
Note: Also see Raven Queen Skull Bangs.
Thanks to Apus.