Unlike Lithium Golem where the damage can be healed relatively quickly, Vitrol can become a mono-Unstable Gas that's also pretty cheap.
I think it's safe to leave the cost at 2
since 1 quantum is easiliy obtained from a card like Immolation or Nova.
That being said it's an interesting take on a way to give syenergy to Flooding and a good example of how you don't necessarily have to follow Oldtree's rule.
Please add a sample deck though.