Rubber Duck
Gandalf
Gandalf's durability operates on an entirely different ontological plane. As a Maia—one of the primordial spirits who helped shape Arda itself—his essential being predates the physical universe by an incalculable margin. When the Balrog of Moria destroyed his corporeal form, Gandalf was resurrected and upgraded by Eru Iluvatar himself, returning as Gandalf the White with enhanced capabilities. His staff may break, his robes may tatter, but the fundamental essence of Olorin persists beyond temporal constraints. He has endured over 2,000 years in Middle-earth alone, plus countless ages in the Undying Lands. The wizard demonstrates regenerative properties that make the rubber duck's seven-year bathroom tenure seem rather quaint by comparison.