Chi Wave

Chi Wave is a level 15 Brewmaster and Windwalker monk talent. When activated, it sends out a small green "firework" that will bounce around damaging enemies and healing allies. It can heal or damage the same target multiple times, but not consecutively - it must alternate between an ally and an enemy each bounce. It has a somewhat slow travel time, so if cast while standing away from your party, it can take a while before it starts healing.