I would suggest removing Dimir Charm in favor of a Lightning Bolt or two as Lightning Bolt is just better removal. Also Nicol Bolas, Planeswalker is a very slow planeswalker and while he may have a large impact late game you'd probably be dead before you could play him.

Alright! Thank you for you advice

No problem man. I like where this deck is going. If you need anymore help with it just ask.

I surely will, this is my very first modern deck and I love grixis. There are so many cards to choose from

You should check this deck: Modern Grixis Rise/Fall. It's more of an aggro-control deck, rather than plain control that I assume it's yours, but it's worth looking at.

That is funny, I was looking at your deck just before I checked my messages, I like your deck. It looks really fun

Actually, the deck's not mine, but I like it anyways. Rise/Fall is more powerful than I thought.