Six Evil Barriers

The Six Evil Barriers are objects from The Legend of Zelda: Ocarina of Time. Found within Ganon's Castle, they create a forcefield that prevents Link from entering Ganon's Tower, until he dispells all of them. Each barrier is centered around one of the six temples of Hyrule: Light, Forest, Fire, Water, Shadow and Spirit. Because of this, each designated barrier area is reminiscent of said temples (the only exeption being the Water Barrier which more closely resembles the Ice Cavern than the Water Temple).

After Link passes the tests in any particular barrier area, he comes to the chamber containing the barrier itself. Using the Light Arrows, Link shoots the barrier, thus allowing the resident Sage to destroy the objects's grip over the castle. Once Link dispells all six barriers, the forcefield preventing entry to Ganon's Tower vanishes, and Link can proceed onward to the trials that lay ahead.