Come to think of it, now Ken-Ken remember why hozen use mask in the first place...
A legend about the Monkey King says he used a mask to cure old pandaren emperor, Shaohao, when he was too sad to lead his people. Then they buried mask--with all his sadness--in the ground.
We should use the mask on more pandaren, but instead of putting sad away in ground, we gonna PUNCH ITS BUTT.
Let's do this, <name>!
Completion
We saving pandaren, but the land still sad... Look, rain's not stopping at all!
<Ken-Ken shakes his tiny fists at the sky.>
How many more butts we gotta punch before we fix this town?!