I hurried through the halls, trying to find the room I needed, but no luck. I looked around, nobody. No human, no skeleton, no... shadows. I guess what I saw back in the storage room was an imagination. I continued to run through the halls, but not making a sound. A loud frog-like sound echoed through the tunnels. I paused, looking through the empty corridor. Something was there.

I caught a quick glimpse of two golden circles in the distance. They grew quickly, until the shadowy figure appeared and ran straight for me. I took out the knife and slashed at it while it came at me. It vanished in a flash. Literally, a white flash. "Did I get it?" I asked out loud? I decided this place wasn't safe either, so I entered a room to my right. This was the chemistry laboratory. A note was hanging off a cupboard.

"MHL-3 Acid is strong enough to burn through steel very quickly, but must be used cautiously. On the lab desk, you will find 3 different liquids. We have not defined an appropriate amount of liters of these liquids. All we know is these are the liquids you need to burn through steel." The rest of the pages were torn out.

I couldn't lock the door, otherwise I'd be locked in. There's no way I'd be able to open that rusted door again. I looked at the liquids, unsure of how much to pour. Back in high school, I failed chemistry! There were 3 big bottles of the liquids. Each carried about 10 liters of each. That was enough for many different solutions. I grabbed the nearest beaker and tried inputting each liquid. I knew about labs from the past, and I eventually managed to get a working solution. I quickly wrote down the combination I used: 96, 168, and 64.