The Witcher 3: Wild Hunt first paid DLC "Hearts of Stone" was released on October 13. The add-on not only added new quest to the game but all some new Gwent cards. This guide posted below list out all new Gwent cards in Hearts of Stone and how to find them. In total, Hearts of Stone DLC adds 10 new Gwent Cards: Eredin Breacc Glas The Treacherous, Francesca Findabair Hope of the Aen Seidhe, Foltest Son of Medell, Emhyr var Emreis Invader of The North, Schirru, Toad, Olgierd von Everec, Gaunter O'Dimm, Gaunter O'Dimm and Cow.
Eredin Breacc Glas The Treacherous
How To Unlock: Buy from trader at Upper Mill - Monster Leader
Francesca Findabair Hope of the Aen Seidhe
How To Unlock: Buy from trader at Upper Mill - Scoia'tael Leader
Foltest Son of Medell
How To Unlock: Buy from Trader at Camp near Carsten - Northern Realms Leader
Emhyr var Emreis Invader of The North
How To Unlock: Buy from Trader at Camp near Carsten - Nilfgaard Leader
Schirru
How To Unlock: Win from Trader at Camp near Carsten - Scoia'tael
Toad
How To Unlock: Win from Olgierd von Everec - Monsters
Olgierd von Everec
How To Unlock: Win from Shani in Oxenfurt - Neutral
Gaunter O'Dimm: Darkness
How To Unlock: Buy from trader at Upper Mill 3x - Neutral
Gaunter O'Dimm
How to unlock: Win from Hilbert at the Auction House - Neutral
Cow
How To Unlock: Loot on upper floor of the barn in Brunwich - Neutral