You must speak to the target in a language you both know to modify its memories and describe how the memory is changed. The target fills in the gaps in details based on your description. The spell …

One creature that you can see must make a wisdom saving throw. If you are fighting the creature, it has advantage on the saving throw. A modified memory doesn't necessarily affect how a creature behaves, particularly if the memory contradicts the creature's natural inclinations, alignment, or beliefs. A modified memory doesn't necessarily affect how a creature behaves, particularly if the memory contradicts the creature's natural inclinations, alignment, or beliefs. You can permanently eliminate all memory of the event, allow the target to recall the event with perfect clarity, change its memory of the event’s details, or create a memory of some other event. If you cast this spell using a spell slot of 6th level or higher, you can alter the target’s memories of an event that took place up to (6th level), (7th level), 1 year ago (8th level), or … If you cast this spell using a spell slot of 6th level or higher, you can alter the target's memories of an event that took place up to (6th level), (7th level), 1 year ago (8th level), or …

You can permanently eliminate all memory of the event, allow the target to recall the event with perfect clarity, change its memory of the event’s details, or create a memory of some other event. If you cast this spell using a spell slot of 6th level or higher, you can alter the target’s memories of an event that took place up to (6th level), (7th level), 1 year ago (8th level), or … If you cast this spell using a spell slot of 6th level or higher, you can alter the target's memories of an event that took place up to (6th level), (7th level), 1 year ago (8th level), or … A modified memory doesn't necessarily affect how a creature behaves, particularly if the memory contradicts the creature's natural inclinations, alignment, or beliefs. You can permanently eliminate all memory of the event, allow the target to recall the event with perfect clarity and exacting detail, change its memory of the details of the event, or create a memory of some …