Teacher

This feat can only be taken by spellcasters

Years of studying magics have given you the knowledge you need to teach others, over the course of a few days (5 days for each higher spell level, cantrips are 1 day level 1 spells are 5)
You can teach a pupil any spell, so long as they don't miss too many days of teaching in a row, every day they miss will add 1 day to the timer to learn the spell

Also add +1 to your intelligence