Mordenkainen's encompassing vision

Mordenkainen's encompassing vision was an uncommon spell which increased a caster's vision.

Effects
When cast, the visual ability of the caster increased greatly. It allowed the caster to have a full 360 degree view. Additionally it was able to function alongside infravision, ultravision and x-ray vision. If this spell was cast with the detect invisibility spell, the caster was able to see invisible creatures, as well as astral and ethereal creatures.

Components
In addition to verbal and somatic components, the spell required a material component, a special crystal disk. This disk had eight eyes carved into it.