4X Raven Guild Master
I see 2 Cloak of Mists, but very little else in the way of clearing a path for the Guild Masters... Have you actually played this deck much yet, and if so, have the Guild Masters been worth the four (six, with Cloaks) slots?
Also, have you considered the Odyssey standbys Traumatize and Haunting Echoes? Or Supreme Inquisitors? Are Millstone-like effects fair game, or does it absolutely have to be removed from the game?
2X Booby Trap
I see absolutely nothing in your deck or sideboard that would give you any indication of what card is on the top of your opponent's library... 6 mana is a little steep for a guessing game... Don't get me wrong - I love the Booby Trap in a deck built to take advantage of it, but the card has no place in this deck - or sideboard.