18.1.7 Free for All

Free for alls (or FFAs) are combat-oriented events that take place in the
arena. The rules are simple: Once the event begins, use any means necessary to
destroy everyone else in the arena. The last player alive, wins. 

Like all arena events, ES, or EVENTSTATUS will show you the status of the
event.

Read HELP ARENA for more information on the arena and related commands.