Drider chief

Drider chiefs are bloodthirsty creatures that lurk in the depths of the earth, seeking warm-blooded prey of any kind.

Special abilities
A drider chief has a spell resistance of 14 and permanent freedom.

The bite of a drider chief inflicts large spider venom on monster hit. In addition, this creature (excepting the level 21 version) can cast darkness once per day as a spell-like ability with a caster level of 6.

This creature is a sorcerer with the following spells known.