Experimentation (Ex)
Source: Familiar Folio, p. 9
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 (Pathfinder RPG Advanced Player’s Guide 60) 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 (Pathfinder RPG Ultimate Magic 149). The homunculist can select the Evolved Familiar feat as an alchemist discovery if he meets its prerequisites.