Medium

Mediumship is the ability to mentally travel throughout the veil and multiple planes.

Mediums
Mediums are witches who have died and returned from the dead. This can be through natural or magical resuscitation. Once a witch dies, they lose hold of their powers making them a medium. Since witches are set to be trapped in the veil after death they would usually go there, but now without their powers they have no limitation to the veil. This allows them to see and interact with spirits.

Abilities
Mediums have a wide range of abilities including
 * Passing through the veil
 * interacting with the dead
 * looking back in time through spirits
 * manipulating the veil

Limitations
The power mediums have is far more limited than witches as they use spirits for their abilities. Some of these limitations include They also risk danger of losing their conscious mind when practicing too strenuously.
 * Inability to look into the future
 * Inability to physically travel throughout time and place