I thought you had to bring it to Scorpion out in Chaos realm next to the graveyard area. Because he is talking about how one of the Shirai-Ryu has been reportedly slain and he wants their mask as proof. And so i found the dead ninja, got his mask, and gave it to Scorpion. Mission complete right?
Well, i thought so, but later on, for no reason really i went back to the dead body, like...DAYS later in the konquest time frame, and when i checked the body, it gave me yet another mask. Ok, so now im thinking... i already gave him the mask, what do i do with this one? I thought maybe the game glitched and doesnt remember me giving it to him. But i went and talked to him, and he did infact already receive the mask and says he has to return to his clan with the news. So now im stuck with an extra mask, and no idea where (if anywhere) to take it. And now you say you have a mask from somewhere else? Weird.