Safe Zone

A Safe Zone is a protection from the Phantoms. As of this date, they have only appeared in The Legend of Zelda: Phantom Hourglass and in that game almost exclusively inside the Temple of the Ocean King. This seems logical, as Phantoms are only ever seen inside the Temple and the Temple is located on Mercay Island. The Safe Zones are purple and glowing. While Link is standing on them, he can't be noticed by Phantoms or Phantom Eyes, although conventional enemies (such as Keese) still can attack him. Link is still free to attack his enemies even if he is standing on a Safe Zone.

In the trailer of the upcoming The Legend of Zelda: Spirit Tracks, a Safe Zone can be seen. A phantomesque sidekick can also be seen, and is showed to be controlled by Link, rather than being his enemy. No explanation for this in terms of story is given in the trailer.