Help me use Modify Memory without my players knowing!

[Veven1290]

So my player in a one on one is soon to run into a psionic aboleth and i absolutely love Psionic modify memory. I think it would be awesome to run the encounter as the modified memory instead of just having the player pretend he doesn't remember. I was thinking of just having him role for an unspecified will save and if he fails it, the next 5 minutes will play out as the modified memory instead of the actual events. Any clever ideas to expand on this or make it simpler/better?

 

[Alexander123]

Great idea, go for it!

 

[Corwin of Amber]

If you're doing this, you might have to have an NPC, journals, etc to sum up what was in fact modified.

You could treat the real memories as a dream sequence (he subconsciously remembers them) in order to not railroad his actual non-modified actions. This will allow you to know what types of clues to give when he finds out his memories have been modified.