Hm... I'm assuming you're referring to Slade's demonic aura ability? I don't think that The Russian Machine would be affected by the burning part, but since it sounds like Slade's body produces the venom he probably would be affected by that. Then again, Slade is from a different dimension has a physiology completely different from humans (At least, so I'm assuming). Is really depends on the source of The Russian Machine's power, which I have yet to decide. If it's magic, then Spade might not be able to damage The Russian Machine at all. But I think probably Slade's venom and physical damage would still effect The Russian Machine.