False Memory

Regular; Resisted by Will 
Insert a single, simple false memory into a subject’s mind. This spell is often used to avoid paying bills, and is considered highly illegal in many areas. 
If the implanted memory conflicts with a real memory, the subject’s brain will usually fit the new one in anyway, leaving him slightly confused but convinced. 
In case of extreme direct conflict – “You remember killing the duke” (when the subject saw the caster kill the duke!) – the subject should be allowed a bonus on his resistance roll; the example above would be a +5 for a loyal subject, but probably only +1 for somebody who wanted to kill the duke.

Duration: Variable. When the spell ends, the subject gets a second resistance roll, at -1 for each day the spell lasted. If this roll is failed, the subject will believe the false memory indefinitely, but is likely to remember the truth at some unpredictable time, perhaps as a result of a shock. 
Cost: 3 for a duration of an hour, or 8 for a whole day. Cost to maintain is 3 per hour if cast for an hour, or 4 per day if cast for a day. 
Time to cast: 5 seconds. 
Prerequisites: Forgetfulness and six other Mind Control spells.

Item 
Any item. Always on; the item causes the wearer to remember one false memory specified when the item is created. The wearer will forget the memory one hour after the item is removed.  
Energy cost to create: 500.