The caverns sung.
Heat and fumes rising from the deep left the air blurry, and the rapidly changing temperatures made the stalactites growing from the ceiling hum and chime. Between crystal stalagmites big and small walked an elf, and she was the last elf in the world.
You crumple to the ground, the Sword of Destiny clattering out of your grasp, its glow dying like cooling embers. The Sword has rejected you, in the midst of your ultimate test; it will never let you wield the power again.