A strange "substance" obtained from fighting against the All-Devouring Narwhal. Its actual weight far exceeds what would be expected given its size.
Everything gathers around heavy objects, just as gold attracts more than iron, or the ground more than in the breeze blowing above. Just as light cannot escape from the vortex of darkness, cause and effect is attached to fate, perhaps irreversibly so.
But the heavy "substance" in your hand doesn't feel real, as if it was only a shadow of the All-Devouring Narwhal's prey. Perhaps you only fought the echoes from the depths of the universe.