Elementals are found most commonly in Avalon I believe. Between the Wild and the Wyrd, you will come across plenty of elemental-type enemies from storm elementals to death treants.
If you are looking to get the badge quickly, I would recommend farming the life treants in Tanglewood Way in Wysteria. They count as elemental types and they are generally easy to farm.
Hope to see you all in the Spiral! Nathan GreenEyes 120 PvP Commander Nathan GreenEyes 117 Hot in more ways than one (lol) (Currently questing through Mirage) Genevieve HexPyre 114+ PvP Warlord (Currently questing through Mirage)
Nathan GreenEyes 110 Couch Potato Hoarder Noah SkyHeart 50 Being Unproductive Nathan SilverBlood 50 Spending TOO Much Gold On Fashion