* not obtainable legitimately in Survival mode
* found in Creative inventory or using /giveme mesecons_commandblock:commandblock_off
* glows slightly when turned on
* runs a command in the context of the targeted player
* player can be targeted by name, or using the special forms (@nearest, @farthest, @random)
* when powered, runs its command with its parameters
* right click to bring up the configuration screen
* diggable and modifiable only by its owner, the person who placed it
