I would run two more polukranos instead of soul of zendikar or yisan. I ran four the other day and loved having one available all the time because people will kill em off quickly. I do agree having arbor in the main board tho, Im probably going to do that. Chord of calling gave me some issues last week but I'll keep it in the deck, hopefully get use to it. Nylea is awesome in this deck too; she was a game changer last week. I prefer the 2014 garruk for now because he brings out creatures and since this is a creature deck, its highly useful. having the Whip is interesting but Im sure I would stumble over it if it was in my deck. I LOVE genesis tho, stupidly awesome: chord to genesis, pull the top 6 on average, pull a poluk from it. love it. I know one guy hated me after i played the scuttling doom machine. Black devotion is still rocking face, I might try it out but I seriously have only 10% of the cards lol