This article's content is accurate to the most recent public game version, 0.4.8d.
"Made from distilled lumes."
The Lume Elixir is an item that restores 60 MP to the user. It's significantly more expensive than simply purchasing White Crystals (200 lumes vs. 1000 lumes), but the increased MP recovery makes it a more effective item for use during combat.
The following merchants sell Lume Elixirs:
The following enemies drop Lume Elixirs: