Daydream

The caster picks a single target that must make a WIS save to avoid being charmed.  If they fail, the target is momentarily distracted as their mind wanders into distracting thoughts.  They need to make a perception roll higher than the spell DC to notice any movement or noise around them, and no action can be taken on its next turn.  The target can still use a bonus action, or react at the very end of their turn.

If the perception roll fails the target does not realise they have been briefly charmed.  If it succeds they are fully aware of the spell caster once the spell passes.

A sneaky caster may use this to distract for a quick dash past a guard, or use this to get a brief respite from an oncoming attack.