Chronosyte

Chronosyte is a rare mineral with special mystical energies that allows its user to control time travel. In the EMPATH: The Luckiest Smurf story series, the Key Of Chronos is powered by sixteen chronosyte crystals, which ended up becoming the only way that the time-lost Smurfs could travel through time when the original Key Of Chronos was destroyed in a lava crater in the prehistoric past during The Lost Year.