Man, I haven't posted in years... Wazzup?
Anyway, brain-dump. Here we go.
Rubidium + Caustic Gas + Heat = Salt
I've suggested this before and figured I'd toss it into the list. Rubidium is a close cousin of sodium and "Caustic Gas" resembles a halogen like chlorine (although maybe a little too acidic).
Caustic Gas + Hydrogen + Heat = Acid
From gas to liquid.
Distilled Water + Caustic Gas = Water
Chlorination, perhaps?
This is a good idea, but this will break some saves, I believe. Maybe they should add this as the switch thing like the Water Equazation thing.
I don't think there are many substantial saves that use CAUS in heat reactions.
My main concern is that CAUS might not be an adequate analog to a halogen.
Well, I wouldn't be against having an entire periodic table to work with, but I imagine it would be an absolute pain to simulate. It would almost have to be 3D.
Maybe a new Halogen element could be added (HLGN or HALO or something), but I feel like it wouldn't have enough uses outside of reactions like these for it to be given priority in development. The more the better, but still.
Check my suggestions in the feedback thread if you want me to suggest a halogen type element. I'm sure, with a little research, and that ^, I can make an appropriate suggestion.
Ah, okay. Le edit.