This is the White Eyes HS Shaman Legendary Card from the upcoming expansion Mean Streets of Gadgetzan.
It’s a Shaman class minion and the card text reads: Taunt. Deathrattle: Shuffle ‘The Storm Guardian’ into your deck.
You can get White Eyes by opening packs from the Mean Streets of Gadgetzan set.
The Storm Guardian HS Shaman Card
The Storm Guardian HS Shaman Card is a 10/10 for 5 mana and has Taunt.
This minion is shuffled into your deck after the deathrattle from White Eyes is activated.