Nintendo isn’t giving us a break with all these Skyward Sword videos. We have a new Skyward Sword Trailer for you guys and its about the Upgrade System and how you go about  upgrading various items. It seems that you must collect certain items in the game and bring it back to the various craftspeople and shops in the game. In this case Link is upgrading his Wooden Shield to Banded Shield by collecting (2) Amber Relic(s), (1) Monster Claw(s) and (1) Jelly Blob(s). Link also collected a Ornamental Skull, which can only be found on the Bokobolin, on the way but wasn’t used in the upgrade. Check out the trailer right after the post jump.

Source: Nintendo Everything