The function of this deck is not only to mill, but to get as many enemy creatures into the graveyard as possible. There are many cards in your deck that will take advantage of cards being in the graveyard, especially creature cards. I need help trying to narrow down what I want to keep and what to bring in from my maybeboard and what to keep in the sideboard. Any feedback would be great. I haven't added dual lands yet either, because I haven't looked at which dual lands I currently own that are U/B, so if you want to add any of those to your suggestions, be my guest.