Purge
Allows for bulk deleting messages. You can purge messages from a specific user (or users) by specifying them in an argument.
You can also delete all messages between two messages by providing the two message IDs as a range (firstID-secondID), or delete a single message by its ID.
The messages must have been sent within the past week.
Usage: /purge <number|message range> [user1,user2,...]
Aliases: clear
Required permissions: Manage Messages