The Witcher[]
"Assassins from the sect known as the Zerrikanian Sun use this flash bomb to cover their escape after they eliminate a target. Sentries and guards blinded by the flash are more likely to attack each other than their opponent. The sect trains its assassins to close their eyes instinctively at the moment of detonation; witchers need not do this as their mutated pupils automatically narrow in response to the explosion."
Zerrikanian Sun is a bomb in The Witcher that, upon detonation, releases a flash of light, blinding all nearby opponents.
Its journal entry can be obtained by reading Secrets of the Southern Masters.
The Witcher 2: Assassins of Kings[]
Zerrikanian Sun returns as a bomb in The Witcher 2: Assassins of Kings that can be crafted by means of its corresponding formula.