Aquavision

Aquavision was a common spell used by merfolk wizards in Serôs.

Effects
A caster used this spell to provide sight in deep water. It was most effective at depths were normal human vision was unable to see without illumination. The spell allowed the caster to see up to a distance of 60 feet (18 meters). The spell did not work very well in the presence of bright light. A caster using this spell was unable to see invisible creatures with this spell.

Components
In addition to verbal and somatic components, the spell required a material component, an eye from a deep-sea creature. The caster ate the eye during casting.