I don't know if 20 lands is enough, you have to allow for the possibility that you might not have an Elvish Archdruid by the time you want to 'go-off'. Primal Surge is the only non-permanent in the deck right? So when you cast Primal Surge you pretty much have to go crazy right then. What about Elvish Visionary ? I know he doesn't make any mana on his own, but make a blocker + draw a card?I don't know, I have no answers. But I think this deck is a cool idea. Actually I wonder if you need Biovisionary at all. Resolve Primal Surge , then if you have no other non-permanents, you can just vomit up your whole deck onto the table (or at least until you hit the other Primal Surge ) > a couple Worldspine Wurm and a Akroma's Memorial should do it.

+1 from me

@ jasonbrown669 At the moment I am at 55 cards; not sure how to feel the next five slots, I am thinking of taking the Biovisionary out and going pure Green and putting in some green fatties sticking with just the 2x Primal Surge and maybe upping the land from 20 to 24; I just like the idea of having the Biovisionary win clause in the deck but it's not a necessity as you said if I drop a Primal Surge i'll be spewing out my deck until the second one or if I have both in hand I can go until I feel like stopping. Just not quite sure how I want to go..Was thinking of staying U/B Mainly cause once Standard rotates I will be losing a lot of the main core of this deck and then it'll be less attractive.

Sets that are rotating out do not rotate out until like the end of September. Build an awesome deck for now, then rework things in the fall. I think you have something really fun here.

The thing is, even if you Primal Surge you may not find all 4 Biovisionary if you hit the other Primal Surge . Like, you HAVE to hit all four to win, and if you pass the turn with two on the table, your opponent will see what you're up to and do anything they can to stop you. If you only Primal Surge through like 10 cards; well 5 creatures, 4 lands and an Akroma's Memorial will still end it. Those 5 creatures don't even have to be Worldspine Wurm , they can just be decent monsters.

Also, you have to put pressure on them and/or block before you are casting any of your 8-10 mana spells, so having a variety decent of creatures will give you early game. So I totally support Kalonian Tusker , Strangleroot Geist , Predator Ooze , Thragtusk , Vorapede , you know; just some decent monsters. You gotta have game when you're not 'goin crazy' yet.