Among the five Istari sent to Middle-earth, only Gandalf (Sir Ian McKellen) was allowed to return to the Undying Lands. While it may seem like special treatment, his journey west was far more than a reward — it was the completion of a sacred mission.
Gandalf Fulfilled His Purpose
The wizards weren’t ordinary beings; they were Maia spirits in human form, sent to guide Middle-earth after the cataclysmic wars of the First Age. Gandalf's turning point came when he fell battling the Balrog in The Fellowship of the Ring and was sent back with renewed purpose: to help defeat Sauron and destroy the One Ring. By the end of The Return of the King, that mission was complete.
There was another reason Gandalf’s journey westward was necessary: he was a ring-bearer. Unknown to many in Middle-earth, Gandalf carried one of the three Elven Rings of Power — Narya, the Ring of Fire. This ring was said to inspire resistance to tyranny and rekindle hope in others, a perfect match for Gandalf’s spirit. But like all Rings of Power, it came at a cost. As Galadriel warned Frodo, the Rings could wear down the soul over time. Had Gandalf remained in Middle-earth, he likely would have faded, much like the Elves themselves.

Gandalf’s return to the Undying Lands may appear like special treatment, but in truth, it was a rare alignment of purpose, purity, and power well-used. As both a Ring-bearer and a faithful servant of the Valar, he stood apart from the rest of the Istari — not because he sought greatness, but because he never lost sight of his purpose.
His journey west was not a retirement. It was a homecoming — the final step of a long road walked in wisdom.