Assassinate

Choose a creature you can see within range.  This spell only affects creatures who can see and from whom you are completely hidden.

You assault the target with a vision of their own death.  The target must make an Intelligence saving throw.  On a failure, they suffer 8d10 psychic damage.  Additionally, the creature is wrapped in silence, preventing them from creating any sound until the end of their next turn.  On a successful save, the victim takes only half damage and is not silenced.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d10 for each slot level above 5th.