Radagast is not a large part of The Lord of the Rings, so it makes sense that Tolkien wouldn't explore the character's fate ...
He placed a piece of his immortal spirit within ... the evil entity known as Sauron, hellbent on conquering all of Middle Earth. The original novel/prequel films, The Hobbit, stars Frodo's uncle ...
Fans finally get to see Sauron's true form in LOTR after years ... an image from Weta Workshop's concept art book for the third Hobbit movie, which shows off what the Necromancer looked like.