This addon is designed to alert people nearby when you enter battle. Right now it supports 3 different phrases that it selects randomly when you enter battle. When v1.0 comes out it will support as many phrases as you want and will be able to notify in party/raid/yell not just say.
commands /setbattlecry1 and /sbs1 set battlecries that are in random. Current version only supports /sbc1, /sbc2, and /sbc3 (along with /setbattlecry counterpart of those)