Shrouded

The Shrouded are an alien species that exist in the Marvel Universe.

Physiology
Nothing concrete is known about the Shrouded save that they appear to be tall beings shrouded in dark cloaks with a reddish glow at their center.

Culture
Many races in the Marvel Universe regard the Shrouded with fear and respect. They appear to possess advanced medical abilities, capable of resurrecting the dead using nanomachines.

Source

 * Cyclops Vol 3 002