New Resources & Different Types/Colors of Elixir for New Themes/Motifs

This is a fairly broad idea meant to spark new more specific ideas, but I do have a couple of my own specifics in mind. I think this could bring in more players and even give current players more reasons to buy more gems!

First I thought about how a White Elixir would be cool to be sort of the antithesis of Dark Elixir, then I thought you could do a whole range of colors with different themes. Like a Green Elixir that allows you to build structures or train troops with a sort of "nature/woodland" theme, or maybe a Blue Elixir with maybe a "aquatic" theme or a Light Blue for an "ice/winter" theme, and a Red/Orange/Yellow Elixir with a fire theme.

Then I thought why limit it to different types of Elixir? Why not create an entire array of different resources? This could lead to all different types of defenses and troops with different themes that would allow the user to pick and choose their preferred combination. Like Fire & Ice would be cool. My ideas are mainly centered around the elements, but that's just the first thing I thought of. I'm sure Supercell could come up with their own cool themes too, but I would also like to hear what other kind of themes and motifs for resources/elixir other people might have. Share it if you have something good! Thanks