Gaddock is bad, Magus should be 1 or 2 of in the side. 1 Sire in the Mainboard, along with maybe Elesh Norn. Iona is a must have 1 of in the side. Run 4
badlands, a
bayou, and a
swamp mainboard along with 10 black fetches. 4
Reverent Silence in the sideboard. A single copy of
Chrome Mox is useful.
Btw it's not important but the deck is just BR reanimator, you don't have to reference the colors of your targets because you arent going to be casting them.