Huh. Fascinating. Nothing to spend all this loyalty on except staying alive. I'm not sure about the third ability: isn't it just casting Naturalize except that it sometimes randomly zots a planeswalker?

Yeah, it is, but I don't like spelling out "Planeswalker" on cards. Having her destroy creatures seemed out-of-color, and lands would be too powerful.
I posted this on MTG Salvation and was told that it's too strong. The criticism was that the tokens didn't make sense as Elementals (which is fine, that can change), and that the second and third abilities were too strong. I can agree about the second, but the third doesn't seem overly strong to me. It's certainly strong, but basing it on creatures tempers that somewhat, right?

Huh. This brings up an interesting question of "Can Planeswalkers be Hybrid?". I suppose Shadowmoor had a fair share of Legendary creatures that were hybrid... but it seemed appropriate for them, because they came from a land of dualistic nature. Normally, when I see a straight up hybrid card, I think "This card is as much blue as it is black. I could cast it using blue mana or black mana because it is so generic a thing among both colors." A Hybrid Planeswalker kind of walks against that line of thinking, since there's only one of them in the universe. She's not 'Green or White'... she's both. I suppose that, storywise, she'd have to be comfortable embracing both viewpoints, being equally likely to react in a very green fashion, as well as a very white fashion. It would be a bit like if Captain Sisay was sometimes the leader and captain of the Weatherlight, and sometimes a wildwoman who stalked the jungles of Jamuura.

Oh, that's really cool. I wouldn't have thought you could find three abilities that fit into too colours, but I think this would make sense in either colour!

And I quite like the ascending loyalty: it's a trick that shouldn't be overdone, but it should happen once and G or W are the colours for it.

I thought the comment on MTG Salvation was way too negative: I'm a bad judge of planeswalker power, and I agree these abilities COULD be problematic, but I don't think it's obvious.

Repeated permanent destruction is risky, but as it's inherently limited by your creatures, I think it's probably ok, the opponent has two answers (just not play non-creature artifacts, or kill some of your creatures).

Repeated recursion is risky because it can make a lock, but also, a planeswalker is probably the place for it.

jmg: good question, I'd not even thought of that. I guess it's a bit like the difference between producing hybrid mana and consuming hybrid mana. Some people are scientist/politicians, as in their power comes from being BOTH. But some people are EITHER: they would be equally awesome if they spent their whole life doing science only, as if they spent their whole life doing politics only...

To me, a hybrid planeswalker isn't necessarily one that is either green or white, but one who views the two as having such a close relationship that she can use both equally, and to the same effect. This is, necessarily, a bit different from my mechanical view of hybrid, which requires a hybrid spell to make sense in either color alone. Still, I don't view hybrid effects as "generic," but merely a representation of the closest point of the two colors.