it's an entertaining idea, but you lack any form of actually defending your creatures, I'd suggest looking to the 3 guilds' charms that are in your colors to answer this problem. As for the deck's speed I'd suggest swapping out Quirion Dryad (too many mono green spells in the deck) and the Elvish Visionary (not enough beats or ways to abuse the etb trigger) for more aggressive and resilient 2 drops in Lotleth Troll and Strangleroot Geist , both have build in ways to survive removal and both have abilities that add on +1/+1 counters.

Excellent point about the protection, I think the Bioshift might not be critical here, and am thinking about replacing it with 2xSimic Charm and 2xGolgari Charm . I'll also swap the two drops, for something more face beaty. Thanks!