The Magic Bell is an extremely useful item that, when equipped, prevents your Gems from depleting when using magic spells. To find it, you need to get all eight Master's Emblems and go to the northwestern part of the GreenWood and speak with the Fairy Gem. The Emblems can be found in the GreenWood (two), King Magridd's Castle (two), the St. Elles dungeons, in the Soul of Mountain House, Lune the underground lake, and the first town model in Leo's Laboratory.