These are from a novel written in my native language. This is a fantasy novel with a fictional world, in which there's a language, which isn't elaborated IRL but it has some "Latin-sounding" words, e.g. in the in-world versions of the mentioned sentences. I'm just curious how they sound in the real Latin. I translated these sentences from my native language to English, only for this reason.
1. My place is by the side of the Empire.
2. I'm waiting for my punishment.
3. My blood and marrow are yours. Do with them what you will.
Originally, this isn't an English quote, neither is it from an official translation. Literally it should be:
My blood and marrow is yours. Do with it what you will.
"Blood and marrow" refers to one's life, this is the resason of the the singular, but I don't know whether it would be possible in English and/or Latin.