The Hobbit
The Hobbit, 107 - 118
What makes Gandalf’s sword “gleam” in the dark? The Hobbit Book
What makes Gandalf’s sword “gleam” in the dark? The Hobbit Book
Gandalf's sword gleamed because goblins were about.
He took out his sword again, and again it flashed in the dark by itself. It burned with a rage that made it gleam if goblins were about; now it was bright as blue flame for delight in the killing of the great lord of the cave.
The Hobbit