!quiz join - Adds whoever says this to the quiz list.
!quiz leave - Removes whoever says this from the quiz list.
!quiz reload - Only available for mods+; resets the quiz list.
!quiz links - Links to the normal quiz links (thread, Chatzy).
!quiz info - Links to this.
!quiz [anything not in this list] - "Command not found."

===NOTE===

Regular !quiz DOES NOT WORK ANYMORE. Use !quiz info for that.