Daydream

1st-level enchantment

Casting Time: 1 action
Range: 30 feet
Components: V, S, M (a tiny, four-panelled window)
Duration: Concentration, up to 1 minute
Class: Bard, Druid, Warlock

You float some mildly distracting thoughts into the mind of a humanoid you can see within range. The target must succeed on a Wisdom saving throw or have disadvantage on Wisdom (Perception) checks (taking a -5 penalty to its passive Perception as a result of this disadvantage) until the spell ends. A creature immune to being charmed is unaffected by this spell.

A creature that succeeds on the saving throw by 5 or more is aware that an attempt was made to influence it with magic Otherwise, the creature remains unaware of the magic that affected it.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st, or you can extend the range of the spell by 30 feet for each slot level above 1st.

Source: Heliana's Guide to Monster Hunting