True Seeing

This spell gives the willing creature you touch the ability to see things as they actually are. For the duration, the creature has truesight, The creature can see in normal and magical darkness, see invisible creatures and objects, automatically detect visual illusions and succeed on saving throws against them, perceive the original form of a shapechanger or a creature that is transformed by magic, and can see into the Ethereal Plane, all out to a range of 120 feet.

Classes: Bard, Cleric, Sorcerer, Warlock, Wizard

Subclasses: Arcana Cleric, Arcane Trickster Rogue, Divine Soul Sorcerer, Eldritch Knight Fighter

Subclasses (legacy): Favored Soul v2 (UA) Sorcerer, Favored Soul v3 (UA) Sorcerer

Source: PHB, page 284