Blind Grenade

A Blind Grenade, also called a Baffler Grenade, is an Imperial grenade that explodes with a burst of dense dark grey smoke including infrared bafﬂers and broadband electromagnetic spectrum chaff, all designed to block eyesight and even advanced visual detection. The effect is short-lived, but while it lasts it provides an excellent cover for advancing forces.

Blood Ravens Variant
A variant of Blind Grenade used by the Blood Ravens Chapter of the Adeptus Astartes releases a bright flash of electromagnetic energy that incapacitates its targets, stunning them for a short duration. This type of Blind Grenade does not work on vehicles or infantry units that are inside of a building.