This deck is terrible because it seems to lack any coherent idea. And the biovisonary thing is just stupid.

As you will notice, Biovisionary is not in my deck, but thank you! And it does have a coherent idea: using prophet of kruphix to get out creatures and utilize the activated abilities of ephara, mercurial Chemister, and Trostani.

I am not sure about Trostani in this deck. the only thing you can populate in this deck is Armada Wurm.

Yeah, while that is true, I usually am getting a huge amount of draw power with cards like Mercurial Chemister, so I always get the both of them. Plus life gain is really good since this deck works so terribly slowly

Too slow and can be easily stopped. Once anyone gets rid of prophit of kruphix, it is game. Good idea, though. Fast decks, like Back to the animals can kill you very easily. I would recommend lower costing cards...