Viscous Muckery

Chose a creature you can see within 60 feet. In an unoccupied space of at least five feet adjacent to the target, you summon a small slime creature that speaks common. The slime's sole purpose and drive is to viciously mock the target. 

The slime has AC 10, is immune to non-magical damage and has 20 HP. The slime automatically succeeds on all saving throws, cannot be grappled, knocked prone, knocked back, or knocked unconscious. Medium or larger creatures can pass through spaces occupied by the slime as though it were difficult terrain. Small or smaller creatures can pass through spaces occupied by the slime at a cost of triple movement. The slime is immune to charm, sleep, and polymorph effects.

At the beginning of your turn the slime moves up to 30 feet closer to the target and casts vicious mockery on the target at the 1st level with a wisdom saving throw DC equal to your spell save DC. The slime unleashes a string of insults laced with subtle enchantments at a creature it can see within range. If the target can hear it (though it need not understand it), it must succeed on a Wisdom saving throw or take 1d4 psychic damage and have disadvantage on the next attack roll it makes before the end of its next turn.

The spell ends after 1 minute, or if the slime is destroyed. If the target dies before the spell ends, the slime begins viciously mocking the nearest creature. As a bonus action you may change the target of the slime's mockery.