Joko's Ninja Exchange rewards!

"The second thing you’ll need is an ancient, mystic Shadowknight artifact called a Tao. The method for their creation has been lost to time, but we Raven Ninjas still know how to use their power." - Fiona, Raven Ninja Weaponsmith

Looks like you make Tao items as well. I dont know if anyone has worked out how.

Maybe the taos will be released in the 2nd part of Crimsonwood because ir says they are related to the Shadowknights, so they could be forged in the keep? I don't know much but it's possible.