Brief Bloodhold

You briefly stop the flow of blood in a target creature's body. That creature must make a constitution saving throw. On a successful save, this spell has no effect. On a failed save, that creature is paralyzed until the start of their next turn.

At Higher Levels. When you reach character level 17, this cantrip becomes more powerful. While the creature is paralyzed by this cantrip, they are vulnerable to all necrotic damage.