Usage: MOTD [<server name>]
Display the current Message of the day for the server that you designate, if you leave the server field blank it will return with the current server you are logged into. Generally this field has administrative information and the rules for that server.
/motd arena.*
You should be familiar with the contents of the message of the day for the server you are using. Despite its name, a motd may not change often, but it may change to reflect network changes. Often a motd will include a list of help channels, and that may change as new channels are added.