This is the Amara, Warden of Hope HS Priest Card from the Journey to Un’Goro expansion due for release in April.
It’s a Priest class minion and the card reads: Taunt. Battlecry: Set your Hero’s Health to 40.
You can get Amara, Warden of Hope by completing the Quest ‘Summon 7 Deathrattle minions. Reward: Amara, Warden of Hope.’ from the Awaken the Makers Card.
If you want to know more about how the Quest keyword works check out this post.