Quote Originally Posted by Barook View Post
Mox Diamonds are bad as they can be dead draws and actually cost you mana in the long run more often than I like.
One Mox can cast two Displacers (which you've upped to 4 MD). Mox Diamond lets you play your City of Traitors earlier than you would otherwise, negating/delaying City's drawback. Mox Diamond saves you life on your Dismembers. Mox Diamond doesn't put an artifact in the graveyard vs goyf decks.

The deck is also running several redundant lands; the second Karakas, second Eye of Ugin, second City of Traitors, second Cavern of Souls, second Urborg...

I'll concede that playing w/ Mox Diamonds over Petals does increase the difficulty of sequencing your land drops.