Described herein are processes and devices that intentionally modify time progression rates in a virtual universe. One of the devices described is a temporal variation device. The temporal variation device can determine an area, in a virtual universe, in which time progresses at a specific time progression rate. The temporal variation device can modify the time progression rate to be faster or slower in the area. By modifying the time progression rate in the area, rates at which action occur also change in a way that is correlated to the change in the time progression rate. The temporal variation device can maintain areas beyond the borders of the area at a time progression rate that is not modified. Therefore, the temporal variation device can create a relative time dilation between the determined area and other areas in the virtual universe outside of the determined area.