My first deck in MtG, evolved from the "Ravaging Swarms" intro pack, after several FNM sessions. I've found that it's a pretty consistent deck. You can win on turn two with Glistener Elf, Grounswell, Groundswell, and a Mutagenic Growth. It's pretty aggressive against all sorts of deck types.
Most of my card choices are pretty obvious. Blighted Agent is a massive threat with a couple of pump spells.
As for pump spells, it's pretty straightforward. Apostle's Blessing is a good card because it doubles as protection for my creatures as well as making them unblockable if used in the right situation.
And, of course, Livewire Lash equipped onto a creature with infect is always devastating.
I've made my sideboard a bit more control oriented, for specific situations. I still prefer Naturalize over Viridian Corrupter because it gives me removal for the Ascension combos.
At the moment, I'm playtesting with Postmortem Lunge. Generally, it's not that great, although it's a very nice solution to removal-heavy/burn decks. Usually, no one expects me to be able to cast a Blighted Agent with haste on turn three, giving me a great opportunity to pump some poison into them undeterred.
Any suggestions or feedback?