The Powder Toy

The shredder is pocket-sized. I scream out in pain as it makes a small cut in my finger, and put it back into its protective casing.   The next user is eaten by VIRS.

The cell is literally a clone of me.   The next user has their head bitten off by a shark. You do not have any protective equipment or weapons.

The dynamite is covered in a casing. I take it out of my mouth and throw it out of the window.   The next user is hit by the piece of falling dynamite, breaking the casing off, and lands in thei...

Please post an attack.   The next user is hit in the head by a CRT monitor falling off of a skyscraper.

I am a small speck of dust, which the missle pushes away very quickly. The missle breaks apart but still detonates because of your above statement, however, I was pushed away so quickly that I fly in...

Heater, C-5

You forgot the detonator, so it is useless as a bomb.   I take out the uranium and toss it off a skyscraper, landing straight on the next user's head.

It can convert things into diamond, just not diamond into anything else.

Repulsion, LOLZ

I am a sentient glass being.   The next user is a regular human without any sort of protection, and is subject to 1000000000000L of sodium hydroxide poured onto them