4e / GSL Paragon Elemental Monsters

[Hawke]

I'm considering turning the latter end of my 4E campaign toward a heavy elemental war. A Genasi empire might be the final culprit that's gained the ability to hide their elemental nature and infiltrate other kingdoms.

In any event, I'm considering have a heavy elemental theme at some point.

Are there any good third party PDFs that might help me expand my monster list, especially any that have scores of Genasi to utilize?