How to make a "smoke cape"?

Hello!

I have my character model, they are a death creature who steals souls of people to become stronger. I want him to have thick black smoke pouring out of his back and onto the ground, like a cape that is all smoke. I am still new to particles and UE altogether. Is it even possible to do something like this? If no how would I do it step by step? If there are any tutorials you have that would help can you please link them, I have spent hours searching but did not find anything.

Thanks!