Bane of the Unclean( Lords of Madness, p. 44)
A creature with this feat hates aberrant beholders so strongly that it gains bonuses when fi ghting them.
True beholder or must have aberration as a favored enemy,
The creature gains a +2 morale bonus on attack rolls, weapon damage rolls, touch Armor Class, and saving throws when fi ghting a beholderkin.
If the creature is a true beholder, the benefi ts of this feat apply to other true beholders as well as to beholderkin.