The new LTR card [[Last March of the Ents]] is an excellent Green "Ok I'm winning now" curve-topper. I doubt it'll see much play in Modern or anything (though I'll be happy to be proven wrong!) but for Commander/Historic Brawl where you can actually cast an 8 mana spell, fantastic.
I'm a huge fan of [[Verdant Rejuvenation]] which is unfortunately Arena-only (though it would have been so easy to make the paper version [[Majestic Genesis]] on par by making it actually reveal until you get X nonland permanents). Last March of the Ents seems like an excellent sidegrade/possible upgrade depending on the deck.
I'm thinking I'll run it in [[Tiamat]]. Cast Tiamat, then next turn you draw seven and can drop all the fetched Dragons in one turn without them being able to be countered. Any other decks that would be particularly synergistic, besides just high-toughness?
I mean, let's be real, it's green. In Commander, the tough thing will not be to cast this, but to cast (and keep) something with significant toughness on the board at that point. Magical Christmas Land hands could cast this turn two if they wanted to.
I think for (mono) green, the bigger issue will be to stack enough high-impact creatures (i.e. Craterhoof) near the top of your library.
That said, I'll probably run this in my Omnath deck (Locus of Mana, but the others can use this just fine), just for another payoff for mana hoarding.
Definitely curious what people will build with this.