Amaunator's Uncertainty (EFA - A)

The power of your faith causes a creature to pause, uncertain what to do next. Choose a creature you can see within range. That creature must make a Wisdom saving throw. On a success, the effect ends for it. At the start of the creature's next turn, it takes a -10 penalty to its initiative score. If the penalty reduces its initiative to a negative number, it skips a turn

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can affect another creature for each slot level above 2nd.