Talk:Rift Plane/@comment-189.68.127.171-20170921162910/@comment-5638912-20170924183602

If you were in any mission that removes your shields, then that's a Nightmare Mode mission, and one of its challenges is Health Vampire which drains health per second over the course of the mission, whether you're in a cold or warm environment, or even if you're in the Rift.