Of course you have various niche 3-drops like Aura Gnarlid and Azusa that you know if you're interested in.
Awakener Druid is fun in C/Ube
Boggart Ram-Gang is basically a RRR card unless you fully support green aggro.
Boon Satyr is fantastic, play it.
Borderland Ranger is ok but I agree with Eric that Farhaven Elf is just better most of the time? Most midrange decks would rather have the accel than the extra point of power.
Caller of the Claw is really fun.
Centaur Courser is very awkwardly named now that Courser of Kruphix exists. On that note, Courser of Kruphix is insane and I want to play >1.
Is Champion of Lambholt good? It's pretty sick with any pump effect iff you have a decent board presence, but if your deck has lots of pump effects you're usually loading up on one guy rather than going wide.
Cold-Eyed Selkie seems cool, though a mono-green card in practice.
Has anyone else been less and less impressed by Eternal Witness recently?
Gluttonous Slime is another nice one for C/Ube
ew Great Sable Stag
Imperious Perfect was good ~5 years ago
Kitchen Finks = GOAT
Ohran Viper is the midrangiest midrange that ever midranged
Reclamation Sage is obv unless you have a really low artifact/enchantment count for some reason
I saw people talk about Scourge of Skola Vale in the BotG preview thread way back when, and it actually looked kinda sweet
Slaughterhorn is very good if you push green aggro
remember when Brian Kibler bought hundreds of Splinterfrights? I wonder what they're kindling for now
I miss Terravore being a Constructed card
I'm rediscovering Troll Ascetic now that I'm pushing Auras and it's still ok
Wolfir Avenger is highly underrated, it may seem that Boon Satyr obsoleted it but you can play both and Avenger is better in a lot of situations.
Yavimaya Elder is so brutal if you're trying to get through with the likes of Isamaru
Yisan is probably way too difficult to make work, sadly
The real problem is that so many of the best green 3s are gold: