What changes would you make to make this more effective?
The deck is all about spamming threats so that the opponent will have nothing left to answer zendo. Infact if he saves his answers you can still swing alot with zendo if tahr, thunderhorn or hamon are on the field at that point.
The deck holds fairly well in diamond but probably only because people do not see big things often and thereby do not have that much removal
The deck is fun to play but not realy to play against.
Let hamon live and you risk taking 16 damage on the next turn
Let zendo live and double killing edge might end you outright on the next turn
Let thunderhorn live and pay with your board on 6 mana
Let tahr live and you are dealing with zendo and a 5/4 frenzy all at once
Let flamewrath live and____you all know what happens if you leave flamewrath alive when playing against kaleos