Re-doing my deck. Need new cards

Okay, so I'm rebuilding my Legacy Mono-Black Control deck and I need new cards.

Cards that are HIGH priority that I need for my deck
- 2 Gatekeeper of Malakir
- 3 Phyrexian Obliterator
- 3 Smother
- 2 Thoughtseize
- 2 Exsanguinate
- 1 Inquisition of Kozilek

My tradelist
https://deckbox.org/sets/270369?s=j&o=d