Justification:
Update to encourage aggressive / lower-curve decks in Green.

HOT TAKE: I don't like Llanowar Elves. Birds of Paradise? Fixes your mana. Holds a sword. Blocks fliers. Iconic.

Arboreal Grazer is not Birds of Paradise by any stretch of the imagination, but I like the versatility the card provides compared to Elvish Mystic. It allows players to keep hands with one too many lands, triggers landfall, blocks early aggressive creatures / fliers, and notably, it is not a defender, so putting counters on it or making it hold a Skyclave Pick-axe isn't out of the question.

On the topic of triggering landfall, Sakura-Tribe Scout is a weird little card that I would like people to see and experiment with, plus getting two lands into play from this card is just insane mana production for a one-drop. Requires significant card-draw to support, but I like the potential it has.

Abundant Harvest is one of the best sorcery-speed cantrips, and it's in Green. Weird. 10/10.

To round out the "atomic unit" additions of Green (shoutout to Lucky Paper Radio for their great episode on this concept exactly), we have Gnarlwood Dryad and Wasteland Viper. These two function as pseudo-removal spells in Green, with Wasteland Viper providing a valuable combat trick and Gnarlwood Dryad playing as a more interactive Nimble Mongoose that isn't a nonbo with equipment.