I feel that her ultimate is too similar to to Garruk, Primal Hunter, so I was considering changing it to "You get an emblem with "Lands you control have : Add two mana of any one color to your mana pool."

Does the +1 need to be restricted to permanent cards? Couldn't it just be any card?

You're right that the last ability is similar to Garruk 2's. It's also reminiscent of Liege of the Tangle's effect.

I chose permanents because that's what felt the most green. I do think I'm going to change her last ability, though probably not to what I noted above. That's not really a "finisher" in any way. If I kept that, though, I might maker her cheaper so that she could be like a mana accelerator.

I sort of like "You get an emblem with 'Creatures you control are 8/8 and have trample.'"

I changed her last two abilities.

Templating note: You don't need to "reveal" a card that you're about to put on the battlefield, so you can save a line there. -3 feels a bit steep to dig up a land: you're using a 5-mana mythic as one half of the 4-mana common Reap and Sow. I'd make that -1.

The ultimate is now very cool though.

Thanks. I don't know why I didn't catch that.

Hmmm... The numbers may need tweaking. This is now a 2 turn countdown to making all your guys 8/8 tramplers. Compare with Garruk Wildspeaker, who "merely" cast Overrun for 1 turn. I think either the loyalty cost for the ultimate needs to go up, or the "8/8" in it needs to come down.

I had changed her elsewhere and forgot to change her on here.