May offend Latin to English Art/Literary Linguistics

I would like to know the exact and proper way to state, "On behalf of our Master Satan, I shall tear your soul (spirit) to shreds!"

I think I'm close, but it still doesn't feel complete. Other sites I've searched across the internet don't have the "I shall" in the translation. Am I missing something?

I've also received both "tuum" and "tuam." Which is correct?

In context, I am speaking to a wide audience. Is there a way to speak to a collective group while not using a plural form of "souls?" I want it to sound as if I am speaking to each one on a personal level, yet speaking to many at once. If not, the direct, singular translation will do.


Also, how about "On behalf of our Lord Satan, I shall destroy you?" ("You" in the collective, as if speaking to a large group.)


-Raevyna