At any time, you may enter a completely accurate simulation of the past created by your power; however, there is no past version of you in this simulation. Despite this, your presence is remembered, and any effects you had on the world at that point are maintained. You may choose to simulate any time within the last year. The simulation automatically ends if enough time passes in the simulation to reach the time you created that specific simulation. No time passes in the present while you are in the simulation. You enter this simulation in the past of the location you were at in the present if that space is unoccupied; if it is occupied, you appear in the nearest empty space. You are free to move around to any location in the simulation even across the universe or local multiverse, and if you end the simulation, you appear in the nearest empty space to the location you were at in the simulation. Being killed in the simulation automatically ends it returning you to the present unharmed.
You may interact with the simulation with your body and powers, with everything and everyone within reacting just as the original would to anything you do. Changes you make to the simulation ripple out and affect the present within a few city blocks of your exit point, as if what you did in the simulation actually happened in the past.
For example, if you kill or save the life of somebody in the "past", but their body isn’t within a few blocks of your body in the present, then nothing happens to them. This can’t be used to create temporal clones of people, so if you trap someone in a location they would not be at in the present and end the simulation at that location, but the original's body isn’t nearby in the present, then they won’t remember being trapped there or interacting with you at that time, and there won’t be a copy of them at that location.