You can choose anyone in your line of sight and tag them. If the tagged person has a power applied to them or uses their power, a similar thing happens to you. If they get buffed, you get buffed and if they teleport you teleport too. This includes mental simulations, time travel, and various kinds of enhancements given by powers. You don't have control over their power, you can only make it so that effects apply to them are applied to you. If they teleport, you can choose to appear within 50 meters of where they are.