Tenebrium is black rock appearing in Divinity: Original Sin. The first point of Tenebrium allows a character to safely handle any Tenebrium in any state without contracting the worst disease in the game,File:DOS Status Effect Rot.pngRot1 non-leathal Void Damage per Turn . You can get the first point of Tenebrium ability by clearing the quest given by Brandon at Silverglen, or reading a book at the Geomancer's house at Sacred Stone. The Conduit Leandra uses this rock to make Death Knights.