Emisun

Also Natural order och gamekeeper need not be 4 of each. A couple of more lands could perhaps be added.

2-4 "Krosan Reclamation" with flashback will help to gather the cards that have been milled to your graveyard. I also think you could lose one of the "riftstone portals" and make room for one of the sideboard cards or the krosan. And also, although "sustenance" works well with the combo it might an be an overkill. Cards that protect the "reliquary knight" in different manners like the "shields of the oversoul" or some of the sideboard cards would be very useful i filling the slots from "sustenance".
The "scoutning trek" is a very interesting addition in this deck since it helps boosting the knight. I also think "bind" could be useful in the main deck.