Augment Familiar

School: Transmutation
Caster Level: Sorcerer/Wizard 2, Hexblade 1
Components: V, S
Range: Close
Target: Your familiar
Duration: Concentration + 1 round/level
Saving Throw: Fortitude negates (harmless)
Spell Resistance: Yes (harmless)

This spell grants your familiar a +4 enhancement bonus to Strength, Dexterity and Constitution, damage reduction 5/+1, and a +2 resistance bonus on saving throws.

(note that a Hexblade can't get a familiar due to NWN hardcoding, and it's unlikely that this changes)