Darkness, 15' Radius 
(Alteration)

Range: 10 yds./level
Components: V, S, M
Duration: 1 turn + 1 rd./level
Casting Time: 2
Area of Effect: 15-ft. Radius
Saving Throw: None

 This spell causes total, impenetrable darkness in the area of effect. Infravision is useless. Neither normal nor magical light works unless a light or continual light spell is used. In the former event, the darkness spell is negated by the light spell, and vice versa.
 The material components of this spell are a bit of bat fur and either a drop of pitch or a piece of coal.