Hey,
I need advice, comments about my standard mono black aggro deck for fnm

https://deckbox.org/sets/828415

Maybe Cruel Feeding? That might be a nice sideboard addition, especially if you have problems with needing more life. Pharika's Chosen makes an excellent blocker, especially if the creature doesn't have trample.

Beyond that, no real problems with your deck. Except one huge, glaring problem. Give it a sideboard.

Best of luck at your FNM!