Delay

You disrupt how a creature moves through the flow of time temporarily. The caster expends their reaction on a target within range and line of sight as they begin their turn, forcing the creature to make a Wisdom saving throw. On a fail, the creature's initiative for the current turn is reduced by 5.

Initiative counts return to normal after and legendary actions, if they creature has any, cannot be used until their turn begins.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, a failed save removes 2 additional points away from their initiative for each slot level above 3rd.