Sheep Finethir found his way into Phandalin where he jumped on Abrams and Eldes. They don't speak sheep so they failed to understand, but quickly Eldes realized the sheep is trying to communicate so he casted Speak With Animals using a scroll the sheep had in its mouth.
Finethir explained that his apprentice turned him into a sheep and tried to take over his work, Abrams and Eldes decided to help the sheep fight the apprentice and turn him back into a High elf.
They followed Finethir to Finethir's Home in the woods west of Phandalin, fought the apprentice and returned Finethir to his High elf form.
Finethir offered them a reward for all the trouble, a single request of any transmutation spell they wish to know, Eldes, asked Finethir to teach him Dragon's Breath. Finethir agreed and said it would take a tenday of practice to be taught. Eldes agreed and said that he'll come back in the future for the lessons.