Troll flesh cannot regenerate when it is burned. If a Troll sustains 1 or more wounds from flames then it cannot regenerate any wounds, not even those inflicted by ordinary weapons.
Source: Warhammer Fantasy: 5th Edition
Troll flesh cannot regenerate when it is burned. If a Troll sustains 1 or more wounds from flames then it cannot regenerate any wounds, not even those inflicted by ordinary weapons.