Invisibility

Invisibility is a spell that turns one person invisible.

Spell Description
At time, discreetion is the better part of virtue. This, in order to sneak by enemies without risking a battle, the Invisibility spell was invented. It is an illusory spell that bends the path of light to render its caster or another target visually indiscernible over a short duration, for the purpose of evading detection. The enchantment is limited to affecting a single person; its greater variant, Invisible All, broadens the clandestine properties to benefit an entire group.

Black potions and invisibility rings fulfill the same purpose as the spell.

The effects of Invisibility are ably negated by its antithesis, Reveal.

History
The spell first appeared in Ultima V named under its incantation, Sanct Lor, and provided the Avatar with a new tool to evade difficult battles. During the early Age of Armageddon in Ultima VII, it also was discovered that the spell produced a serendipitous effect in greatly enhancing one's perception of poorly-lit environments- though at the cost of color vision. By the time of Ultima IX, this spell kept the caster invisible until either mana was used up or the spell was cancelled with another casting.