Faerie Fire

TIME: 1 action
RANGE: 60 feet
COMPONENTS: V
DURATION: Concentration, up to 1 min
EFFECT: Each object and creature in a 20-foot cube is outlined in a yellow shine or inky blackness. Those Affected shed dim light in a 10-foot radius. Any attack roll against an affected creature or object has advantage if the attacker can see it, and they can't be invisible.
SAVE: DEX for no effect