Backstep

You travel into the past 1 round and take an action. You must move to an unoccupied location in the past. During this round, there are 2 versions of you at the same time. Any changes caused by this action may affect the previous turns such as affecting die rolls and will be handled on a case-by-case basis. (For example, if an ally was hurt by an enemy but you went back in time and killed the person who hurt them, the ally would have never been hurt) 

After this round in the past, you immediately take your next turn (which is the same turn you traveled into the past)