👁️5e - Truesight👁️
Some especially powerful creatures, like particularly old dragons, have truesight. This allows a creature to see in normal or magical 💡Darkness, perceive ☠️Invisible creatures and objects, automatically detect illusions and succeed on its saving throw against them, and perceive the original form of a shapechanger or creature that is transformed by magic.
A creature with truesight can also see into the Ethereal Plane.