On the path from Kakariko Village to Death Mountain, there's a little cave in the wall with vines hanging from it that can be grabbed with the clawshot. Use the clawshot to pull yourself up, and inside is a rare chu. If you are quick to kill it before it merges with the more common purple chu, you can get yourself some rare chu jelly which behave like Great Fairy Tears (the stuff the topless fairy gives Link that restores all life and enhances attack for a short while).