I like the deck. Atraxa is really alluring to build around and is fantastic in many situations!

If you are looking for more counters, Mikeaus, the Lunarch puts a counter on everything, proccing things like Hardened Scales or Doubling Season while making everything beefier, good for stuff like Fathom Mage or Crystalline Crawler. At his core he is still just utility for this deck.

You should definitely try to get a Gyre Sage in there, she is cheap and extremely efficient. In comparison, Crystalline Crawler cost and generates about 2 any color mana per turn (assuming Atraxa is out). Gyre Sage generates more and more mana as she gets counters, although it is all green you can still ramp out.

Nissa, Voice of Zendikar and Ajani Steadfast both smother your creatures in counters. Nissa comes out fast if you have and can generate blockers for herself. Atraxa will grow tokens if you put a counter on them which is conveniently Nissa's -2. With Ajani, he can give your creatures a counter and vigilance every turn. Atraxa will give him another loyalty counter at the end of the turn, so he can constantly use his -1.

If you truly want to make Proliferate great again, Inexorable Tide is exactly what you're looking for. With the option to proliferate for each spell, the counters on your creatures will skyrocket to monstrous proportions. This is the card for what your deck stands for.

GoldenDiggle: Thanks for the suggestions! Those are great cards, what do you think I should cut for them?

Enral: That's a good question. I'm not great at cuts, so bear with me.

Thrummingbird is good for proliferate, but since you mostly use proliferate to get counters, I'd say that Mikeaus is stronger as a card. Mikeaus gives a counter every turn without having to depend on combat damage. Perhaps if you had more stuff with charge counters, planeswalkers, and other counter types, the bird would be better, but for just +1/+1 I think Mikeaus is more consistent.

It looks like you don't have a lot of blue cards in the deck, more green. I wonder if it would be worth taking Simic Signet so you can slip in a Gyre Sage. If not, then I'm sure another mana source that isn't needed could be substituted.

Its hard to say what to take out for the walkers... Counter generation? Anafenza, Kin-Tree Spirit is nice that its foil, but I'd rather see an Ajani in my hand. They both cost , Ajani cost more but gets counters on everything.

Inexorable Tide is probably one of the best counter generators for you to have. Citadel Siege also puts counters down at a much slower rate, and they are single target. So I would look at that first.

GoldenDiggle: Appreciate your time and suggestions!

i would think that Everflowing Chalice could be good with proliferate because you get to ramp by one mana every end step!
also is there a reason you are running rampant growth over Cultivate or Kodama's Reach?
finally one of my favorite non crazy expensive planeswalkers is Jace, Unraveler of Secrets - plus him for card advantage, his minus is solid point removal, and if you get to ultimate him it is almost certainly game. with as many creatures and proliferate effects as you have you might be able to protect him long enough to use his ultimate.

Lux Cannon

I do like the idea of Lux Cannon, I also think that Contagion Engine would be a good add. Also Ajani Steadfast would be good, instead of Ajani Goldmane. Brago, King Eternal and Eldrazi Displacer are good ways to abuse Deepglow Skate, as well as any other "when x enters the battlefield", as well as Panharmonicon. Those are just some of the cards I would think strongly about adding.

Darksteel Reactor for alternate wincon

You may want to add Novijen, Heart of Progress if you want some redundancy to Oran-Rief, the Vastwood. I use both in my Ezuri deck.

DrLitebur: Thanks for your suggestions, Ajani Steadfast definitely look like a good alternative. Will test them out!

JohannKlink: Darksteel Reactor sounds like a great wincon. Thanks for your suggestions!

Herbysmoke: No idea how I missed that card, Novijen is an excellent addition! Also might test out Ezuri now that you mentioned it.

Ok love the deck but how is banding and walls not a thing? Building a wall with other people's resources, making magic great again, etc. +1 from me either way