[numberonepal]

My own guess is a kind of multidimensional ‘magical’ popping in & out of this reality to another a la Stargate SG1. What’s your guess?

I think it's cloaking tech. Wictor has mentioned stuff about apparel that is impervious to projectiles. Maybe that tech went another step.

[PeriwinkleMinniepaws]

Cloaking garb would be a reasonable guess. Though, seemed to me, it sounded like it was so exotic as to remove any possibility of being hindered or retaliated against. I’m skeptical cloaking would qualify for those features.