A spellcaster can be judged by the company they keep.
Fantastic Familiars is a sourcebook for the D&D 5e game. It contains a number of variant rules to change the way that familiars are used in your game, along with stats and write-ups for 10 new creatures that can be taken as familiars.
Contents include:
Guidelines for using other familiars than those pre-approved in... [click here for more]