Item description:

All skills just get the ones that are missing and it should pop. you can also get the trophy for upgrading all prosthetic tools all u need is pine resin which is located Ashina Depths in the Mibu Village. Once at the lake jump in and swim toward the right side where the dock is located - you can grapple up here. Once grappled up, go straight ahead and down into the ravine. The Pine Resin Ember will be located on the house at the end of the ravine.