I don't see what the duration on Phantasmal Reminder actually does. It's functionally an instantaneous effect through and through. It says to see text, but there's nothing in the text about it. The only intent behind it I can conceive of is referencing the time frame in which the subject has to have taken damage to be affected (since the end of your last turn), but even that doesn't make much sense. Durations are for spells whose effects extend past the moment of the initial casting, but nothing about the description has it do anything in that time. The saving throw line is wrong, too; it should be Fort negates, not partial.