Nerazim warriors can choose to undergo a ritual which fuses their shadow essence to nimble machines known as Stalkers, granting them a preternatural degree of control over their new bodies. Unlike their Khalai counterpartsDragoons and Immortalsthe Stalker does not contain the severely injured body of a Protoss warrior. Instead, their armored plates and mechanical systems are home to the powerful presence of Dark Templar who sacrificed their former lives to protect their brethren from the shadows.