Announce
From neox4t wiki
(ANNOUNCE) - Announce a message GROUP POWER
Announce is a group power that lets you create a custom welcome message that will be sent to all users that enter your chat.
To use this power, assign it to your chat group. Find Announce in your group settings and enter your custom welcome message into the box. Then click "save" at the bottom of the page.
You can also use tags in your Announce message. Available tags include: {id} {regname} {nickname} {userscount} {latestpower} {rank} {chatversion}.