I'm looking for answer to the question and don't find any official answer, but many questions...
If we read the spell descriptions affects to everyone than serves Fu Leng, but when you read de rules only affects Otherwordly... That must be a mistake because goblins or maho are not Otherwordly but Ki-Rin yues... only Oni and Undead are Otherwordly and Tainted... The only way to affect Tainted creatures is to use an advantage and converte the damage in sacred... But is a stupid thing becaus Jade already is sacred!!!
Whats the official answer?
Sorry, I can understand than is a recurrent question but I don't find any clear answer.