The Spell of Revelation is an enchantment with which the true nature of one thing may be revealed. The Spell of Revelation - "Hierste þæt íecen sóna" - is powerful magic, but it applies best to objects and less effectively to living creatures. Although Gaius' grimoire said the Spell of Revelation was only intended to be used on objects, Merlin tried this spell on the troll Catrina to reveal her true form in front of the entire court of Camelot. Her troll magic was so powerful that Catrina was able to resist the spell, even though she felt it and had to take her potion again (Beauty and the Beast: Part Two). Merlin may have tried another type of this spell when he enchanted the vial containing water from The Lake of Avalon that the Fisher King had given him. The sorcerer had told him that in Albion's time of need, it would have showed him the way. The young warlock tried to scry the vial and the first spell he tried ("Geriht læc me", which meant "True form, what is right for me") may have been a Spell of Revelation. Anyway, the only way to unleash the vial's power was to break it: this allowed Merlin to contact his deceased lover, Freya, the Lady of the Lake (The Coming of Arthur: Part Two).