983650f0__attributes___The_Witcher_Wiki__Ability_name
[Effect] Vitality regeneration at night: +2. [Means of acquisition] Sneak through the camp undetected during the Where is Triss Merigold? quest (Iorveth's path) near the end of Chapter II. [Chapter begun] 2 (Iorveth) [Ability name] 
Child of the Night
Character attributes - The Witcher Wiki
Ability name