The Shadow Knight
Useless against what awaited them.
The Shadow Knight moved, flowing between petrified trunks to position himself behind the rearmost pair. These would be the least experienced, assigned to guard the formation's back. Their nervousness betrayed them, heads swivelling too quickly, hands gripping weapons too tightly.
He rose from darkness directly between them. Before either could shout warning, shadow-tendrils lashed out, wrapping around throats, cutting off sound. Their blessed weapons passed through his insubstantial form, finding nothing solid to strike. He solidified only his hands, reaching into armoured chests to clutch beating hearts.