It seems odd no cards like Doubling Season or Primal Vigor are on here. Is there a reason for that? Other wise some other good cards for counters I've found are Incremental Growth, Phytohydra or Primordial Hydra, Solarion, and Daily Regimen. If I may say so, if you truly do have a fetish for +1/+1 counters I feel like Ghave, Guru of Spores would be a better fit for you. Abzan (G/W/B) is all about counter interaction, and the black opens up the door for things like Corpsejack Menace.

Doubling Season is there. As for going abzan; I'm just overall not a fan of black. My two favorite colors are G/W so I'd rather stick with those. Plus I already have most of the cards for this deck, I'm lacking a few of the more expensive ones. In the case of the Hydras, I didn't do much research for this deck, as its basically a copy of my Trostani, Selesnya's Voice EDH deck, albeit for a few of the cards.

AstroAA, you have some fun cards here, that I've either never seen or had forgotten about (e.g., Winding Canyons and Land Tax).
+1!

I was looking at your artifacts ... I find Akroma's Memorial and Caged Sun rarely stay on the board long enough to make a difference. Maybe Contagion Clasp or Bow of Nylea?

clayperce Thank you! Yeah; I never knew about some cards like Triumph of the Hordes until a few weeks ago. It is really overpowered in decks like this and token decks.

On the note of Akroma's Memorial and Caged Sun I can probably find a replacement for Akroma's, however really I only have Caged Sun in the deck for extra mana which is really useful in getting things out early and paying for the +1/+1 counters through Chorus of the Conclave. I do like the Contagion Clasp, but I'm on the wall with Bow of Nylea

Thanks for the suggestions though :D I'll think about them.

Makes sense. If you've got your group somehow convinced to leave your Caged Sun alone, more power to you ... literally! :-)

Speaking of mana though, I almost always run a Citanul Hierophants. And while I'm not a big fan of Karametra, God of Harvests, a lot of people seam to swear by her. And though there's a lot of enchantment hate out there, Druids' Repository can be REALLY powerful too.

And while I'm on enchantments, I love Cathars' Crusade and it might be a good fit for your deck too. I also really like Reconnaissance for aggro and Shield of the Oversoul when I want to Voltron somebody up...neither brings counters though, so no worries if they're not a fit for you.

And oh yeah: Oran-Rief, the Vastwood!

You'll have to ingore the red cards, but you may find something else useful in my Rith deck Smashface Gardening with Rith (suggestions please).

One more thought: Maybe a Tempt with Glory, to go with your Tempt with Discovery

maybe add a Doubling Season.

@Guildsofravnica its in there in the maybeboard; I would run it but I don't want to pay $30 for a card that is immediately going to get blown up.