Expeditious Deceit

This spell allows you to deceive at an incredible pace. When you cast this spell, you mention a course of events and magically influence the memory of a creature you can see within range that can hear and understand you. Creatures that can't be charmed are immune to this effect. The deception must be worded in such a manner as to make the alleged course of events fit within a reasonable timeframe. Describing a course of events that are completely illogical or would take longer than 30 seconds to occur ends the spell.

The target must make a Wisdom saving throw. On a failed save, it fixates its attention on the implied series of events and forgets what happened 30 seconds prior.