School: Chronomancy (Transmutation)
(Intended for use with the Chronomancer subclass)

Age Object:
As the caster focuses on the object or area, they determine a volume in cubic inches they wish to affect.  Every second they concentrate, the non-living material inside the volume either ages or moves through time at a rate of (caster level x 1000) / (2 x cubic volume) days per second.  An example here would be an 8-cubic-inch padlock aged by a level 3 caster for a full 5 minutes would advance a maximum of ~150 years.  A level 20 caster doing the same would advance it ~1000 years.  A level 20 caster attempting to age a child-sized statue (2500 cubic inches) for 5 minutes would age it 800 days.
NOTE: The minimum dimension that can be used in this calculation is 1/2 an inch, so a 8.5 x 11 inch piece of paper, for example, which normally has a thickness of 0.004 inches, can at the very least be calculated as 8.5 x 11 x 0.5 inches, yielding 46.75 cubic inches, NOT 8.5 x 11 x 0.004 inches, which would have yielded 0.374 cubic inches.

Rewind Object:
Attempting to reverse the age of the item instead yields half the results.  This spell only works on non-living material, as time potential is much greater (and thus harder to alter) where living beings are involved (even more so as their agency or potential for influence increases).

Casting Modes:
There are two "modes", or mind-frames, in which this spell may be cast.  It is simplest to think about this difference in the following way: cast the spell targeting a volume of MATTER, or cast the spell targeting a volume of SPACE.

In the former case, the subjective and causal passage of time from the matter's perspective is altered.  Time begins to accelerate, causing the reactions, wear and tear, loss or expenditure, and increase of entropy to affect the matter itself.  Metal could rust, and crumble.  Bread could mold, flowers wither, silver tarnish, a lit log burn to charcoal, etc.  In the reverse form, the spell causes the subjective flow of time to be reversed, rust or broken metal reforming and renewing, moldy food returning to freshness, dead flowers returning, etc.  This is the only "safe" form in which this spell can be cast (base 0% chance of a disturbance to the demiplane of time, no chance of paradox), and this is the only functionality this spell can ever have if cast by any magic user other than a Chronomancer (who do not understand the far more advanced details of space and time's codependent relationship).

In the latter case, a fixed volume of space is focused upon and -like the window on a slide-rule- is temporally slid forward or backward through time.  This region of space can be anything the Chronomancer decides; the space bounded by a wine bottle, or by a window frame, or immediately surrounding a page of paper, for example.  The contents within the volume of space change to reflect what WAS/WILL BE inside that space at the point in time the spell moves the slider to.  Words on a page that are most likely to be written may appear if sliding forward; or if already written, will disappear if rolled far enough back.  A seemingly-"empty" region of space, such as a shattered window-frame, may suddenly fill with intact glass if rolled back to a point when they were undamaged; or if rolled forward, a perfectly fine window may shatter because a rock will be thrown through it in the future (or, may stay completely intact, just gaining some grime, if nothing ever goes on to break the window in the future...)

Higher Level Slots:
For each level of spell slot expended above level 2, add another effective caster level when calculating effect, and increase chance of temporal disturbance to the demiplane of time by 5%

This spell is an original work.