My personal smallPOX (Legacy)

The strategy is that of the classic pox deck. You have to control your opponent on 2 fronts: lands and cards in hand. Usually I prefer to immediately hit the mana of the opponent thanks to the wasteland or sinkhole and if possible start to thin out his hand thanks to the best "discard cards" of the format. Inquisition of kozilek is an arrow to your bow to eliminate a problem in the bud, hymn to tourach at the cost of 2 black mana will empty the hand of the oppo. Collective Brutality is perfect in a combo with Bloodghast or Nether Spirit that you will discharge for the escalate ability giving you a second way to damage your opponent and allowing you to play the discarded creatures at 0 cost.
Speech separately must be done for the smallpox that if played at the right time will take advantage on 3 fronts: land, cards in hand and creatures in play. DEVASTATING. It is important to understand the moment to play it because it can turn to be a double-edged sword.
Innocent blood is the best way to eliminate what will pass through the already tight meshes of your control system and do not be afraid to sacrifice your creatures, they always come back;)
Bloodghast and nether spirit along with mishra's factory will be your road roller that will crumble a futile endurance.
Liliana of the veil I do not think should be presented but in this deck is closing.
I prefer the Diabolic intent than infernal tutor because you will not have to wait to have an empty hand but it will be enough to sacrifice one of your creatures to choose the coup de grace that you will hire from a little later.
Separate speech must also be done for the Bitterblossom in combo with contamination, this combo will allow you to turn any source of mana into mono black, also considering the impact it can have on an eldrazi deck where the sources produce 2 mana at a time ! it is also true that it will not always be feasible or advantageous, sometimes you will not have to use it because your bitters will have already massacred the oppo! But turning the whole world into a swamp at 3 rounds is priceless, for the rest there is mastercard XD
The side is oriented to the most frequent problems of the format and allows you to face almost all the challenges that should arise.
Tell me your ideas and what does not convince you, thank you!