Epoch

By manipulated the time around an object, you can revert it to a prior form that it had gone through since touching the object. The object can be 5 foot cube or smaller, you cannot revert it to a time where it was being held/used/worn by creature, the object cannot regain mass but it can lose it. This spell cannot return magic to a magic item or object or constructs. 

An example in which you can use this spell for is to turn a sword back to its raw material to reforge it into a different or better version of itself. This spell cannot mend objects but it can restore its luster and condition to new.