Faerie Fire

Each object in a 20-foot cube within range is
outlined in blue, green, or violet light (your
choice). Any creature in the area when the spell
is cast is also outlined in light if it fails a
Dexterity saving throw. For the duration, objects
and affected creatures shed dim light in a10-foot
radius.
Any attack roll against an affected creature or
object has advantage if the attacker can see it, and
the affected creature or object can’t benefit
from being invisible.