Sage Fefer is a Lifecrafter who will teach you low-level magic spells in Battle Magic, Blessing Magic, and Mental Magic circles. He will not train you until you speak to Shaper Rawal and accept the quest The Presence. He will train you regardless of your loyalties, though by the point you reach a full status with the rebels you'll long have since outleveled the spells he offers.
He does not offer any quests.
Sage Fefer can be found in Isenwood's Spire.
Sage Fefer appears in Geneforge 5.