Commands
What does /attack do?
On Rex Mu, /attack is a Game Master command; players cannot use it as an auto-attack.
⚠️ On Rex Mu, /attack is staff-only (Game Master) and is not available to players. It does not work as an auto-attack toggle for your character on this server.
Other MU Online servers may have a public /attack for auto-attacking, but that does not apply on Rex Mu.
If you want to automate attacking, check whether the server allows MU Helper or an equivalent official tool.
Commands · Auto Attack