To change a small crystal seed or crystal chime back to a crystal saw, go to Brimstail's cave in the Tree Gnome Stronghold and use it on the singing bowl in the western room. The singing bowl can be reached by crossing the crystal bridge to the island in the rift, and it looks a bit like a fountain.
Upon dying, your crystal chime will be destroyed and you will have to replace it by getting another crystal seed from Brimstail, then transforming it in Yewnock's cave, south of the Tree Gnome Village. Enter the cave, go through the tunnel to the northeast, and use your crystal seed on the singing bowl.
Upon using the chime whilst fighting against a Warped terrorbird or Warped tortoise, your character will stop fighting upon the first hit. The only way to block this is to click on the monster you are attacking again or turn on auto-retaliate.
Before an update on 3 March2010 players were required to click on the chimes in your inventory before the Tortoise/Terrorbirds could be cleansed.