Originally Posted by
Totaltotemic
The way that it works is during Serenity you press a button that spends chi, and then you immediately get the chi back. You BoK, and you get 2 chi back. You PB, get one chi back. Guard, get 2 chi back. You can even BoF if for some silly reason that sounds like a good idea and you'd get 2 chi back.
The mechanics of it spending and refunding chi immediately are really just for WW's sake (to generate Tigereye Brew), but for BrM all that really matters is basically "you have infinite chi for 10 seconds" if you have at least 2 going into Serenity. This typically manifests as 10 seconds straight of spamming BoK and PB.