Quantum Refractor

Quantum Refractors, commonly called just refractors, are the main energy source in the Mega Man Legends series. Quantum Refractors are found deep underground in ruins guarded by Reaverbots and traps. Refractor shards can be found inside Reaverbots. It is a Digger's goal to find Quantum Refractors or treasure in the ruins. Many machines are powered by Quantum Refractors such as the Flutter and the support car.

Smaller Refrators, known as Refractor shards (resembling actual shards in Legends 1 while looking like small refractors in Legends 2) are, instead of being used as a power source, are converted into Zenny, the world's currency. Reaverbots often drop these upon defeat. The highest class of Refractor Shards are Blue, common in the first game, while in the second, Blue Refractor Shards are incredibly rare, only dropped by one enemy, while Dark Violet is more common.

Large Refractors are often found at the very end of Sub ruins, guarded by boss class reaverbots, and if not, usually trigger an alarm system upon being taken. color is an apparent standing on the rarity and power of the Refractor. B Class, Large refractors are often blue, A class are Yellow, while S Class (able to power the Flutter) are Red.

An enormous, Multicolored refractor is seen near the end of Legends 1, powering the Main Gate. It is taken as spoils by the Bonne Family which they sold for a large sum of money (though it ended up not being enough).