Of all Manifestations discovered by Sin-Eaters, the Caul is among the more intimate. When a Sin-Eater dons the Caul, he invites his geist deep into his body, allowing its plasm to flow outwards through his every cell, filling him from the inside out. Sharing his body with his geist is an incredily intimate act, one that strengthens the ties between the Bound and the geist. Once it’s within his body, the Geist can change his flesh, molding it in ways defined by the Key used to unlock this Manifestation.