Confront Nelacar

Sure, Necromancy is seen as just another school of magic by the College, but Dagur still wouldn't take too kindly to sheltering a necromancer. Anyway, the college- and the guards, for that matter- would be interested in the fate of Nelacar's 'subject.'

Any man, let alone an Altmer, would pay any price for freedom. And with this scroll, you literally held Nelacar's in the palm of your hand.

You trudge over to his table and wordlessly slam the scroll atop the sea of notes he was still lost in. You waited just long enough for him to realise what it was before whisking away from beneath his high-tipped nose. The necromancer's shoulders slumped as he sighed, no longer interested in his word soup of theories and experiment observations.

"I wondered where that got to. Guess it'll cost me more than a spare bit of ink and parchment now."

"Alright then," he declared, sitting up intently, "What is it you want? Tomes? Gems? Relics? I'm a little light on gold at the moment, but I'm sure we can come to an agreeable arrangement."

You'd have no use for gold should you get into the College of Winterhold, and to pass the entrance test, you'll need more than a measly fireball to impress the examiner. The choice was obvious.

"Tomes. Apprentice at least," you stated simply.

"Very well, here's the best I've got" he replied, emerging from beneath the table with a pair of tomes that were armpit-deep in his satchel.

An apprentice Obliviate tome, and a battered old thing with a peeling spine and dusty pages.

Obliviate is an apprentice illusion spell initially intended to wipe the targets memory. However, this is only possible when wielded by a highly experienced mage. Novices may cause short term memory loss at best, or use it in combat to briefly disorient foes.

As for the other one, the best you got was some Khajiit rumor that it was won from some Daedric Prince in a drinking game or something.

"So..." Nelacar trailed off, eyeing the incriminating scroll expectantly.