Materia Cave

The Materia Caves are special locations in Final Fantasy VII scattered across the world (one not on the map) which are only accessible by a special Chocobo with the exception of the Quadra Magic through the Quadra Magic Cave Glitch. Inside each is one special materia which you will never find anywhere else.

The four materia are:
 * HP<->MP: Switches the HP and MP max;
 * Mime: Copies the last attack your party performed;
 * Quadra Magic: Allows the paired materia to be cast four times in a row, albeit with reduced power;
 * Knights of the Round: The ultimate summon spell. Interestingly, since Round Island has a forest on it, Mystery Ninja can appear in a random battle outside the cave if the player has not recruited Yuffie yet.