Time Shift

You touch a willing creature, and on the following round of combat, they gain a +1 bonus to their initiative. You can also target an unwilling creature, making a melee spell attack against them using your spellcasting modifier. On a hit, you reduce their initiative by 1 on the next round.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the bonus/penalty to initiative increases by 1 for each slot level above 1st.