Looking at Llanowar Druid, I was musing that this is actually more like Seething Song than Llanowar Elves. In other words, it's a oneoff burst of mana acceleration, and therefore it's more suitable for red than green. Red doesn't often get beneficial interaction with Mountains, but I don't see why it shouldn't. Koth of the Hammer did it.

In fact, this is actually very similar to an activation of Koth of the Hammer's second ability. Oh well, there's room for different variations of such effects.

Yeah, it seems very appropriate to me.

Green gets a permanent boost of forests, black gets more intensive swamps, red gets a temporary burst of mountains, blue temporarily turns things into islands. White gets, um, the same thing as green but a lot less good? :)

I really like a lot of these designs. Do you mind if I use them for a set of my own?

I tend to treat posting a card in this set "Cards With No Home" as an invitation to others to use it wherever they want :) Certainly you're welcome to use anything I created that's in this set.

It's nice when you create the equivalent card in your set to post a link back here, but that's about all we'd ask :)