We are the real Gandalfs.

Neither he nor the Balrog was killed by the fall, and Gandalf pursued the creature for eight days until they climbed to the peak of Zirakzigil. Here they fought for two days and nights. In the end, the Balrog was cast down and it broke the mountain-side as it fell. Gandalf himself died following this ordeal and his body lay on the peak while his spirit travelled outside of Time.