My entry for (((Challenge # 016)))
+1 is basically a Llanowar Elves though it can be used the turn you cast it.
-2 is a Rampant Growth
Ultimate doubles the mana your lands produce for the turn; balanced by the fact that you can't trigger it before turn 5 without help (or turn 6 if you want to keep him around).

This is probably not very balanced but none of the abilities are anything that green doesn't do

Sadly the Rampant Growth is achievable turn 1, which is too strong. Make it -3 or starting loyalty 1 and this is a very good 1-drop planeswalker design.

I was going to say to Alex "Yeah, but you're doing that at the cost of a planeswalker..." Then I realized I was wrong, and he's right. Sacrificing a planeswalker for a land feels like a high cost, but it's really only costing . Rampant growth should be delayed a turn.
Otherwise, I do like this. I like particularly that his ultimate is just a sort of burst of power, rather than an emblem or something. I feel that's appropriate.

That's a pretty strong +1 as well. It means that this card effectively costs . Playing this and a Birds of Paradise on Round 1 should mean game for some match ups...

you're right so I changed the +1 to generate rather than and the starting loyalty to 1.

Hmm... What would be the worst thing you could do now on round 1? Sensei's Divining Top perhaps? It's funny. You would think that the difference between and wouldn't be that great, but that's nowhere near as good as double acceleration. That might be fine.

...Yeah, it seems like this should still be overpowered, but somehow I think it might not be. Good job.