This is not just a WordPress plugin, it is the lyrics from the seminal metal song Raining Blood by Slayer in the upper right of your admin screen on every page. I completely ripped off Matt Mullenweg’s Hello Dolly plugin to make this. Hopefully he doesn’t hate me for it.
Download the zipped plugin here, unzip it and put the file in your wp-content/plugins folder, or upload the zip through the manager. Activate it on your dashboard and enjoy a line of Raining Blood by Slayer every day!
Note – this plugin is not even remotely supported by WordPress.