Night Vision

Night Vision is a runic spell that appears in Ultima Underworld I and II.

Spell Description
Night Vision enables the caster to magically see their surroundings without actually providing illumination (which might attract nearby foes). Much like the traditional Britannian spell, Infravision, this incantation gives the mage an edge against foes who rely on their sense of sight to detect their prey, offering the spell-user the advantage of darkness. It should be noted, however, that this spell robs its caster of the ability to see colors.