This article's content is accurate to the most recent public game version, 0.4.8d.
"Draws power from ambient light to recover 20 MP."
Cost: 20 TP
Source: Natalie - Starting skill.
Light's Blessing is a skill that restores 20 MP to the user.
Until you become rich enough to afford an ample supply of White Crystals, or simply if you dislike spending items and lumes, you'll be using this often.