This is the Shadow Visions HS Priest Card from the Journey to Un’Goro expansion due for release in April.
It’s a Priest class spell and the card reads: Discover a copy of a spell in your deck.
You can get Shadow Visions by opening packs from the Journey to Un’Goro set.
*Interesting card, it’s card selective card draw. Could really save you when you need a certain spell.