Would it be too overpowered to ask that you can retrain your beast once if you attach the collar to it? I figured out a few combinations that might not be too bad on my nightmare if I added a collar to it, but it might be some time until I can spare credits for my beast. And having it running around with a few trains unused I'd hate, too. :<

There's an envoy change on the report such that you can retrain a collar beast once every IC year.

Oh, that's cool.
I want my own pet eventually, but until then, a nightmare with a collar would be enough.

It's extremely odd that a beast will repop minus a level in 1 hour if killed normally, but if killed with a collar, only come back after 18 hours. I really think this should be changed somehow- let the beast repop after an hour like normal. If you want it back faster, make a pet instead.