Firefly

Firefly
Type	Energy
Description	Fireflies recover automatically. Their recovery speed is affected by your Lumina Grid and can also be increased by smelting Colossus Patches in the Workshop. These miniature constructs operate under the command of the Colossus' controller and are responsible for restoring and maintaining the Colossus' structural integrity.
Source	Regenerate over time Colossus Materials Dismantle in the Workshop

Fireflies are a type of Energy in Alchemy Stars. They have a variety of functions on the Colossus.

Use

Fireflies are used to upgrade facilities on the Colossus.

Source

Fireflies are regained over time, and the rate for their recovery depends on the number of Lumina Grid rooms on the Colossus. The rate will increase by 5% per hour if players deploy Aurorians with the Work Skill Firefly Keeper.

As well, players can use the Colossus Materials Dismantle function in the Workshop to obtain fireflies in exchange for smelting Colossus Patch I, Colossus Patch II, or Colossus Patch III.