The Magichron is a large hourglass with two orifices with symbols on its top and bottom, one representing the sun and the other the snow. These symbols represent the Spellstones of the sun and snow that must be inserted in order to make the Magichron work.
The Magichron has the ability to go back in time. However, it takes an immense amount of magical energy to make it work, more than what can be provided with a Sorcerer's Stone or a battery. The only thing capable of giving it enough power are two Spellstones that are found in the Shaula Desert and the Gienah Thundra.