A few moments later, I'm looking at the charred remains of Slenderman after I sprayed it with molten tungsten.
The next user was that Slenderman.
The acid is just tartaric acid, and thus very weak. I survive.
The next user is about to be shoved into the turbines of a dam.
Edit:How?!
Well, I have a spare universe as backup('Cause you know, why not?If I can destroy the universe, surely I can back it up?). I replace the old one with the backup.
The next user is about to be thrown into a fission reactor.
Edit2: Again?!
However, the acid lake was frozen, since it was in Antarctica.
The next user is normal human who is suddenly teleported four billion years into the future. They are on the surface of a barren future Earth that has no water, since it all boiled away, and the air is 320 degrees celsius. They will die within ten minutes.