/say
Make the bot post a message, a file, or both. Use the optional reply parameter to have the bot reply to a specific message — right-click any message in Discord, select Copy Message Link, and paste the link into reply. The message ID alone also works if you have Developer Mode enabled, as long as the target message is in the same channel you’re running the command from.
The ping parameter controls whether the reply sends a notification to the person being replied to. It’s off by default — notifying someone with a staff reply is a deliberate choice, so you have to opt in.
Attach up to three files in a single call using file, file2, and file3. Once a file is attached, the message text becomes optional, so the bot can post a standalone image with nothing written above it. Files marked as spoilers stay marked as spoilers.
/say won’t give you permissions you don’t already have. If you type @everyone into the message, it only pings the server if you have permission to do that yourself.
/emoji
Copy an emoji from any server you’re a member of into the current server. Paste the emoji directly into the emoji parameter. Animated and still emoji count against separate limits — if one is full, the command tells you which rather than returning Discord’s generic error. Use the optional name parameter if the current server already has an emoji with the same name and you want to use a different one.