Telepathic Tile

Telepathic Tiles are items from The Legend of Zelda: A Link to the Past. These grey stone tiles, engraved with the symbol of the Triforce are found in inside areas such as dungeons and grottos. When triggered, the old sage Sahasrahla speaks to Link by means of telepathy. Sahasrahla usually provides Link with useful tips and secrets. Inside dungeons, the hints given are usually related to the completion of the dungeon in question; in other locations, the subject matter is more general.

Apparently, Sahasrahla can communicate telepathically with Link (as can Princess Zelda) without the use of Telepathic Tiles, as he does so after Link is transported to the Dark World after the first battle with Agahnim, raising the question of whether or not Telepathic Tiles are really necessary. Also, in the manga by Shotaro Ishinimori, Sahasrahla contacts Link telepathically via a device known as the "Comm Fork" and Telepathic Tiles do not appear in any capacity.