Mediumship is the ability to perceive and communicate with the spirits. This power has only been shown to be naturally possessed by Seers, due to their keen eye. Those who have this power are able to see into the spiritual and physical plane at the same time, almost existing in both.


While they didn't naturally possess the power, the entire town was indirectly given the ability to see the spirits during the Merge as them being invisible and intangible, able to them possess others, caused too much chaos.