The Powder Toy

Some particles, like pions, are also their own antiparticle.

Tungsten (Used in light bulbs.)

Turns out, it was a real life Basilisk lizard, which is harmless.   The next user is subjected to a gravitational field strong enough to tear their body apart.

The sword had a sharp blade made of ice. In your attempted stabbing, it shattered.   The next user is travelling through a portal, when the portal closes, with half of their body in one location...

However, I happen to be standing under a tree, preventing any ignition from sunlight.   The next user is going to be an enderman in Minecraft, and they will fall off of the End into the void.

@billion57 (View Post)  I know that you could find magnesium in the camping section of places like Walmart. The radioactive element americium can be found inside most smoke detectors. As for sod...

I thought that we already had charcoal in the form of what happens when WOOD is heated to moderately high temperatures.

I'm in a room with my dog named Fred Figglehorn.   The next user is teleported to my secret underground facility, which is located in an antimatter universe.

I managed to teleport into another universe before they could reach me, and collapse the universe they are in.   The next user is in that collapsing universe.

I happen to be a leopard seal. Therefore, I survive the extremely cold water.   The next user is on a planet being hit by a neutron star.