When you fight the giant spider thing at the temple of time, put your arrows in b and your rod at anywhere else with quick use. First take out your bow and aim at its eye, when it opens, fire away until it falls, it should be by a giant statue. take out your rod and take control of the statue by the spider and press b, the statue will hammer punch the spider, repeat this until he explodes. when he explodes his eye will become yet another spider. just keep shooting the eye and ignore the baby spider, repeat this until the spider explodes and turns into the next mirror shard.