Arcane Transcriber (5e Feat)
From D&D Wiki
Prerequisites: Intelligence 13, ability to cast at least one spell (excluding Wizards)
You have learn that taking notes can pay off and have created a makeshift spell book.
You are able to transcribe spells into your spell book, taking 4 hours and 100gp per spell level.
The cost represents material components you expend with the spell as you get the transcription correct, as well as the fine inks you need to record it.
You are able to transcribe any spell that you know, and any spell that you find, that is on your classes spell list.
To transcribe a spell that you do not already know you must succeed a intelligence check with a DC of 11 + the spell level, on a failure the time and gp used to transcribe the spell are lost and you must take a long rest before attempting to transcribe the spell again.