Farengar Secret-Fire

 serves as the court wizard for Jarl Balgruuf the Greater at Dragonsreach in Whiterun, where he conducts studies regarding magic and dragons.

Study
Farengar's study is attached to the main hall of Dragonsreach. He sells various Spell Tomes and has an Alchemy Lab and Arcane Enchanter. Additionally, Farengar sells enchanting supplies and is himself an enchanter.

When the Dragonborn traps Odahviing in Dragonsreach, Farengar will ask if he can run some tests on him, and does so even when Odahviing says, "Begone mage, do not test my promise to the Dragonborn." Eventually, Odahviing lets out a stream of fire that sends Farengar running from the room.

Dragon Research
Prior to the Dragonborn's arrival at Dragonsreach, Farengar regarded Dragons as hypothetical, mythical phenomena. He is excited to learn of their existence and expresses his wishes to see one in person; however, his wish is denied by the Jarl, on the grounds that it is too dangerous and that Farengar is needed alive in Dragonsreach in order to continue researching ways to counter a dragon attack.

College and Errands
Asking Farengar about his wares can spark the Visit College of Winterhold quest. Farengar also asks the Dragonborn to deliver Frost Salts to Arcadia at Arcadia's Cauldron in Whiterun. When successfully delivered, Arcadia mentions the ingredients will be used to craft a Love Potion, which she jokingly says she will test on Farengar.

The Whispering Door
The Dragonborn has the option of killing Farengar to obtain a key to the room containing the Ebony Blade. It is also possible to just pickpocket the key from him, even with a low Pickpocket skill.

Stealing
Stealing from him at any point may result in a contract to have Hired Thugs teach the Dragonborn a lesson.

Inheritance
If Farengar dies, either by circumstance or being murdered by the Dragonborn, he bequeaths a sum of 100 to them, 10 of which is removed by the Jarl as tax.

Quests

 * Visit the College of Winterhold
 * Give Frost Salts to Arcadia
 * The Whispering Door

Appearances

 * The Elder Scrolls V: Skyrim