From Press Release:
CD PROJEKT RED announces the upcoming release of Master Mirror, the newest free expansion for GWENT: The Witcher Card Game, coming to PC, iOS, and Android on June 30th, 2020.
The Master Mirror expansion brings over 70 new cards to GWENT, themed after the shadowy, powerful influence of Gaunter O’Dimm — Master Mirror himself — and his role in key events in the Continent’s history. Among these new cards are faction-specific ones, including a brand new Legendary card type which evolves in both appearance and power as the battle progresses. 11 neutral cards are also included, which can be used across all GWENT factions. In addition, new statuses and abilities will also be introduced, bringing with them a fresh set of tricks and strategies to take advantage of in the heat of combat.
In anticipation of the upcoming release, a number of Master Mirror pre-order offers have been added to the GWENT in-game store. These packs will grant players access to new cards from the expansion upon its release, with a unique Gaunter O’Dimm leader skin, as well as a Master Mirror-inspired cardback and title also available in specific packs — ready to equip in-game immediately following purchase.