I'm almost certain that you have too many forests compared to your plains.
Permalink
Doesn't supreme verdict just ruin your own day?
Personally, I strongly dislike that oak. You can run murmuring phantasm for the same toughness and 1 less mana...you might wanna consider it. There is also frostburn weird. Its only 4 toughness but doubles the devotion for phenax, and in a pinch you can plus it to kill something annoying.
I play-tested the siren at FNM last night, and it was truly disappointing. I suggest swapping them out for something else. I put in Thassa's Emissary for card draw and that has worked fairly well, but there are other alternatives. I really wanted the sirens to be good, but that trigger is just terribly slow. It basically gives them 2 turns to be able to to find an answer for it.