I really like it, but my problem is the number of plains in the deck for trying to play Gideon. Because Gideon isn't an ally when cast, you need to have 2 plains and the odds are against that happening.
Permalink
This is from the WotC Commander Rules page, "In fact, if a card contains a mana symbol anywhere on it that’s not one of your commander’s colors, you can’t include it in that deck!" But Pontiff of Blight's extort ability isn't a mana ability, thus, making it able to use in the mono-black deck.
Nice try at the deck, but to be an EDH deck, the colors of the deck must be represented in the commander's converted mana cost