The user of this power can take any event that has happened and revert it back to the state that it was previously in, as if the event never happened, thus effectively undoing any changes that occurred in said event. This could range from something as simple as regenerating an arm that has already been severed and incinerated and the wound already sealed off, to rejecting death itself for resurrection. Users can also use this power offensively, for example negating the bonds of molecules to sever matter.