Phyrexian Obliteration (mono black discard control) (Casual)

This deck was build around the Phyrexian Obliterator and the main focus of the deck is discard and board control. The ideal way to begin the game is to play Thoughtseize in the first turns, followed by a Gifted Aetherborn to gain control of the game from the beginning. In the midgame you will have card advantage by playing the entchantment Waste Not. The instants will keep you alive as you can get rid of creature threats and once the Phyrexian Obliterator is on the field, you should be able to win pretty easily. In most cases, it is enough to have davriel, rogue shadowmage on the field combined with the phyrexian obliterator. Using Surgical Extraction will give you the ultimate control of your opponents game.
Even in case of losing an important creature you can keep one Mortuary Mire in Hand to bring it back from your graveyard.
In summary this deck contains a lot of typical black elements and is fun to play. It is not the best possible black control deck but it is reliable.

I am always open for discussion or questions if interested.

Card choices and sideboard:
I did not use dark ritual, even if it can be useful in mono black. The reason is that it generates card disadvantage and this deck wants to achieve the opposite by gaining card advantage. You do not need to speed this up due to the lifepoints you can earn lifelink effects on creatures and because of the control elements that are contained. I know there are a lot of variants with dark ritual in there and they are also doing well.
The other cards in the sidebord are situation depending. For instance bile blight is best choice against any token army deck instead of defile.
Especially against fast creature pressure in aggro decks you can fasten up your removals instead of discard, while more discard options like wrench mind are useful against slower control decks.