If you've found a breed of Spirit that doesn't fling itself over-enthusiastically into the fray without regard for the wisdom of such a course of action, I really will have to get one.

[His Pricklemane chitters at him.] Yes, it will replace you. I told you not to jump on that, but did you listen?

Have you tested that hypothesis? There are some smaller groups of Nightmares around; they would make adequate sources of data on your new associate's combat capability.