@Dynamics
That's still something I'm working on as angels (even the lowest) are incredibly powerful, so there's a lot to think of in terms of power. I'd say Shapeshifting definitely (to blend in mainly) but the rest?
I have no idea.
And then there's the fact that angels (both in my headcannon and the Bible) can't be killed by anything but God...I guess I could do an Absolute Immortality type thing where he comes back after a certain amount of time or something.
A lot of beings outside of their own individual universes are immortal in MR. Usually the way we do it is by defining immortality as really, really, really hard to kill but not absolutely impossible and usually requiring some amount of annihilation. It typically comes with perks such as accelerated healing and the ability to survive most fatal situations (e.g. being torn in half). If you want to do something that goes beyond that, we can definitely discuss how we can fit something like that into the primary physics system.