The ability to become corporeal
Corporealization is the ability to become corporeal, thus assuming a (temporary) solid and visible form.
List of Users
Certain spirits, such as Penny Halliwell, when summoned through the To Summon the Dead spell, can assume a solid form after stepping out of the circle in which they are summoned. Other spirits, such as Rick and Nathan Lang have displayed the ability to become corporeal on their own by channeling their anger. Jackson Ward was able to pick up objects.