Olus Veritis

Olus veritis is the name given to a fungus that grows in the Underdark. The decoction that is drawn from it acts on the pupils in an unexplained way and makes it possible to see incredible things. On the other hand, its effect makes the eye hyper-sensitive to light, which is why the olus veritis is only used underground.
This decoction gives true vision for 1 minute. This allows to see in magical darkness, to see invisible creatures and objects, and automatically detecting visual illusions. On the other hand, the light of a torch dazzles and the sunlight blinds.