A villain gains a power that will only work for a hero, or vice versa.Sometimes, this requires the acquisition of a Macguffin or Character Development to evolve mastery over the power. The power in its current state is incomplete and must be made whole.Alternatively, they may be the chosen one, but not matured enough, so the time is not yet right to harness it. The power does not cooperate with them or refuses to work properly because they aren't The Chosen One or the designated wielder.They can copy the power, but they can't tap the cosmic forces needed to give the power its real strength.This may be because the user isn't as strong as whoever they copied it from.
