New blast set proposal: Nature Blast
First off, I think we already know what "Nature" means in THE City, and that is why I clicked to check out this thread.
With "Nature", I'm expecting plant or spine SFX like the rest of the "Nature" powers.
The way it is listed it is definitely more of a "Druid" power set than it is a "Nature" Blaster set.
Most Blaster power sets have a set theme (secondary effect) that most of the powers have. There are some sets where the damage types vary.
To me, it would obviously be toxic, but I think it would be an interesting secondary effect to be a minor stackable entangle.
Mixing Earth, Wind, and Fire (and electric and cold ... and negative) into it, I could see it more as an Elemental power set.
For some reason my gut reaction is that it gives too many damage types to one power set (Looks like you are trying to give it most if not all of the damage types other than smashing and lethal). Smashing, lethal and an another type of damage are often mixed into a power set. I don't know if there is another powerset that mixes this many elemental damage types (all of them apparently) in one set (which in my mind may give it some kind of advantage over the other power sets, but, as I said, just a gut reaction)