Ballad Heroes is one of the 16 free DLCs for The Witcher 3: Wild Hunt that brings a new appearance to several gwent cards. It was released on 12 June 2015.
The card set can be enabled in the Downloadable Content tab of the main menu.
Official Statement[]
Make your Gwent Deck legendary! The "Ballad Heroes" neutral Gwent card set will provide alternative cards capturing characters from Dandelion's ballads in all their glory.
Gallery[]
All neutral card normal and ballad heroes