well, I think that Poison and Infect are two completely different beasts, honestly. They work to the same end but they are mechanically very different.
I was considering snow, but that is exceedingly uninteresting. I'm thinking maybe a -1/-1 counter focus, though, even if we don't do infect. Or maybe I just want to do Persist again. My current thoughts on mechanics are Persist/Shadow/Detain and some other stuff; we might even still be able to add Poisonous if people like it.
Looks like a ghost plane? Maybe Deadlands
-meets-Magic: The Plane. I do still want to keep this
in where possible.
I know Dion (palingensia) is making an enchantment set, so even though I want to do something like that, I don't wanna step on his design space.