The gas kept flowing from the tunnel's depths, relentless and hungry to react with anything in its path. The corrosive presence becoming more oppressive.
Elio needed to be more careful.
This gas seemed to react violently with practically everything he tried, and the water reaction had demonstrated that some attempts could be more dangerous than the original problem.
Lithium proved to be another mistake.
The reaction generated a flame so bright and violent that Elio had to step back several paces, the heat searing even through his defenses.
He tried using helium to create currents that would disperse the gas, but it was like trying to empty the ocean with a bucket. For every area he managed to clear, the gas regenerated almost instantly, flowing back like a hungry tide.