Scents of the Past

Regular 
When cast on a wall or some object, this spell releases whatever scents it may have been exposed to in the past. The caster specifies the moment from which to start the “playback.” The Time modifiers (p. 81) apply. Each time this spell is cast for the same time period, there is a further -1 penalty to skill. A critical failure wipes away the object’s “memory” of that time period.

Duration: 1 minute. 
Cost: 1 to cast. Same cost to maintain. The magnitude of the Time modifier is added to the cost, so the spell costs 1 (1 + 0) for “within a minute,” but would cost 6 (1 + 5) for “4 to 40 days.” 
Time to cast: 10 seconds. 
Prerequisites: Magery 2, Skills/G-J/History, and Odor.

Item 
Staff, wand, or jewelry. Usable only by mages.  
Energy cost to create: 350.