10 minute cooldown (must be Google Lens translator mistake). It can be used any time you equip the Divine Spirit, there's no need to know the skill. The Dark Lord character gains knowledge details when he equips the stock and gains experience points by way of looking . ① https://210list.com/story20331321/helping-the-others-realize-the-advantages-of-divine-spirit-e-dark-horse-mu-season-20