One of the grand goals of alchemy is the ability to create new life. A homunculist has made this dream a reality, growing and modifying a familiar in his own laboratory.
A homunculist doesn’t gain the poison use, poison resistance, poison immunity, or swift poisoning class features.
This ability replaces mutagen.
A homunculist is constantly experimenting on his familiar to give it new and unusual features and abilities.
At 4th level, the homunculist can grant his familiar 1 evolution point worth of eidolon evolutions for every 4 alchemist levels he possesses, though he can’t select any evolutions that require a particular base form. Each time the homunculist gains a level, he can change his familiar’s evolutions. These evolutions stack with those from the Evolved Familiar feat.