The black, formless shadow dropped out of the tree with no warning.

He formed an army of one, and upon an unseen plain he met another such host, a formless shadow that seemed to be mostly hunger.

And the accusative formless shadow was Delia.

The place was large, and the feeble light of the lamp scarcely reached to the arched roof; all about me were great formless shadows.

(It was not the complete thought, there was a formless shadow at the back of his mind, something about a treason.)

The figure settled back, a formless shadow amidst the sculptures.

Beyond the tents, groups of formless shadows projected from the ground.

And at one point, a white, almost formless shadow seemed to pass out of his right hand.

They haunted his dreams, those formless poisoned shadows.

He motioned to the formless shadow that was the Reaper, and the monster rose up out of the night.