Faerie Fire

Source: Player's Handbook

Level 1 Evocation (Artificer, Bard, Druid)

Casting Time: Action
Range: 60 feet
Components: V
Duration: Concentration, up to 1 minute

Objects in a 20-foot Cube within range are outlined in blue, green, or violet light (your choice). Each creature in the Cube is also outlined if it fails a Dexterity saving throw. For the duration, objects and affected creatures shed Dim Light in a 10-foot radius and can’t benefit from the Invisible condition.

Attack rolls against an affected creature or object have Advantage if the attacker can see it.