Gwent: The Witcher Card Game
The children o' the night come as punishment from the gods! We's tolerated wizard-folk and non-human filth in our midst too long! Repent! 'Fore yer soul rots, repent!
Deploy: Destroy an allied unit and gain Vitality for 4 turns.
See this subject on The Witcher wiki: Fleder
Gwent Update: Mar 28, 2019: Added.