Pollution

such a flavorful deck, just pollution, factories and machines spreading, consuming and poisoning everything, all that matters is resources and the position of power over others, such a hunger for resources that bringing back the putrid corpses out of its oil filled toxic waste ponds just to consume them over and over again has been adapted as a new fuel

If you want to make a more competitive less flavorful version then bitterblossom is 80x better than reassembling skeleton

also if you want to break away from the flavor of the deck more then some interesting card choices could go:

cut smokestack, add damnation?

often times once you get contamination out thats if for the opponent casting any more spells, however if they already have a creature out its super easy to get past your diregraf ghoul or whatever siny skeleton u have and kill you anyway before smokestack can get to killing their creature, so if you cast contamination and then damnation (with bitterblossom you can chose to get a fairie token and then pay contamination upkeep cost) then youve got an open field and no worries of competition coming up

Or:

cut smokestack and blight add phyrexian ghoul and gravepact
once you have phyrexian ghoul + gravecrawler + grave pact in play it becomes at sorcery speed pay B each opponent sacrafices a creature and nantuko husk gets +2/+2
which is VICIOUS, but kinda slow and hard to get out

use gravecrawler or bitterblossom so sacrafice to contamination, smokestack and skullclamp

skullclamp + gravecrawler effectively becomes pay 1B draw 2 cards

contamination screws ppl HARD on mana unluess going against black

smokestack you can keep putting on more counters as you get more sac fodder, say 2 gravecrawlers you can make them sac 2 things a turn

• Zombie
• contamination
• smokestack
• MBC