With a touch, you can give people up to 8 copies of your perks or drawbacks, as long as they make sense to be something that can be given. For example, Endbringer Target could be given, but Overcharge Strike or Second Wave Parahumans could not be given. You can take away these perks/drawbacks at will. If you die they keep the perks/drawbacks forever, unless another Parahuman can remove them. Giving someone Mental Barrier will remove any Master Effects on them, even if they were a one-time effect that isn't actively maintained.