Interesting concept, but I think you could make better choices, especially for your creatures.

Your main concept is to generate tons of tokens so that you can outlast the Descent into Madness and it hurts the opponent more than it hurts you. Cool. So make all of your creatures (or as many as possible) into 2-for-1s. Doomed Traveler instead of Champion of the Parish . Attended Knight instead of Wayfaring Temple . Thragtusk instead of Necropolis Regent . And find room for one of the best token generators in Standard, Garruk Relentless  ^Flip ... Garruk, Primal Hunter could work instead, but he's tougher on the mana, and happens a turn slower.

I can see why you use guys like Champion of the Parish and Necropolis Regent , but don't worry about quality. Go for quantity, and let Descent do the work. You can always just win with 1/1s and 2/2s in the late game, or with a Vraska ultimate.

Update: I took out the Champion of the Paris, Wayfaring Temple and such, and added more tokens and a Vraska the Unseen.

@ObVus, thanks for your help.

Thragtusk

@Opifex: If only I owned one... And besides that, I find Thragtusk good, but rather boring, because everyone plays him at where I play FNM.

Again some changes: got rid of the Oblivion Ring playset, and added some sideboard cards.

Just for easy viewing, you have two entries of "2x Sundering Growth." Could you combine those?

If you can do it, I would recommend Overgrown Tomb over Woodland Cemetery and Temple Garden over Sunpetal Grove so your Arbor Elf has more targets to untap.

The second one should have been card:Druid's Deliverance, so thanks!

I would recommend Increasing Devotion over card:Coursers' Accord. It has a lower mana cost, produces more tokens, and has flashback for the late game.

Instead of Coursers' Accord I would run Vitu-Ghazi Guildmage. For 2 you get a 2/2 that can populate OR summon a centaur token. It has more versatility imo.

Update! Sorin's gone, added Spectral Procession .

I would run Rampant Growth . It will allow you to cast the Descent a turn faster, fix your 3 color mana, and give you another permanent to sac if it comes to that.

I would also speed up your ability to draw the Descent, if it's your goal. Like Idyllic Tutor , or some card draw at the very least, like Harmonize if you can handle the double green in a 3 color deck.

But I like it!

Bitterblossom could be a card that would add tokens quite effectively. you would need a little lifegain to balance this, not sure what you might use.