ok I will try to make that.

How quick do you want him to die?

3 life a sec work for you?

Edit: Gonna add so that if neutrons hit it turns to O2 or something. Just so its a bit more useful.

Dark Matter does not interact with normal matter, and as such, itself is not normal matter. Thus why we can't find it or image it directly.

It's theorized that dark matter passes through us on a regular basis, and obviously doesn't hurt us.
Dark matter "replacing" air in RL is completely wrong. The word 'replace' indicates that something quantifiable is there to replace it, as stated above, we can't even detect it directly.

jeryko
This isn't science toy. This is powder toy. If we had an element where it does nothing... whats the point.

That's why it shouldn't be in there... which IS the point.

And yes, this isn't science toy, but neither is it fantasy toy or 'nonsense' toy.

I'm not going to put that in for two reasons. 1. I don't know how. 2. as jeryko said, theres no effect on us so particles don't turn to gas.

I have it ready for releasing. Uploading to box.net atm.