Many of the wounds are serious, but treatable. The wound at her chest, however, where the pin had been, stays as a hole that simply refuses to disappear, no matter what.

Take her back? Across the galaxy... no; she isn't sure she can even go there, now.

What did it? As though surprised by it, Mercury suddenly moves just her head, to look down at the prominent wound. That's right... She was injured. Badly.

Killed?

"A battle." The words are the easiest summary, and the fewest she can speak while still trying to explain.