So this is only my second attempt to build and some help would be great. the deck is a black/green which is mostly based around getting my devoted druid and my quill spike out at the same time keeping them alive and using devoted druid to make quillspike huge and swing for a kill. I need some help weeding it down (that is the hardest part for me) and maybe some more flying protection. i was thinking maybe a ranking canopy or two. this deck is just for casual play with friends. thanks       

              John 

John, that list of cards is so long, I barely know where to begin. Also you have no lands. So instead of cherry-picking cards out one by one until you have a polished deck, I'm just going to start all over and build you a new deck from the ground up.

We'll start with the combo you want to feature.

Quillspike

Devoted Druid

Now, after the combo pieces themselves, the most important part of a combo deck is adding ways to find your combo pieces. You can do that with tutoring, top-o'-the-deck manipulation, or just plain drawing more cards. I say let's try all three.

Commune with Nature

Beseech the Queen

Wall of Blossoms

Now, as soon as you go off the first time (or, honestly, the minute a savvy opponent sees Quillspike hit the table, since Quillspike isn't really good in any other deck), your opponent is going to go out of his way to keep you from going off all over his board. You need ways to protect your creatures, or at least recover them if they eat an untimely kill spell.

Vines of Vastwood

Grim Discovery

Now, Grim Discovery is the first card I've suggested that needs black mana, though Quillspike and Beseech the Queen were already leaning that way pretty hard so I don't mind. It also suggests that you don't mind if lands go to your graveyard, so we'll add in a few lands you sack. Not only will it fix your mana, it'll thin your deck and incresae your odds of drawing your combo.

Terramorphic Expanse

Jund Panorama

Next, you say you want flying defense. Well, I say you want all kinds of defense. Combo just needs to not lose until it gets to the point where it wins. You're going to need some ways to stop your opponent from killing you, be it through solid blockers or actively denying them their weapons against you.

Traproot Kami

Putrefy

So, here's your final decklist as I see it.

Creatures:

4 Devoted Druid

4 Quillspike

4 Wall of Blossoms

3 Traproot Kami

2 Grave-Shell Scarab

Spells:

4 Commune with Nature

2 Grim Discovery

4 Putrefy

4 Vines of Vastwood

2 Beseech the Queen

3 Phyrexian Arena

Lands:

4 Terramorphic Expanse

2 Jund Panorama

6 Swamp

12 Forest

That should accomplish what you want it to.

Good luck!

~BMoor