Investiture within the Physical Realm will manifest as a solid, liquid, or gas. Solid Investiture in the Physical Realm is metallic. Pushing the entirety of a Shard’s Investiture into the Physical Realm would have disastrous effects. Changes in the Spiritual Realm filter down to and cause changes in the Physical Realm. Perception has a part in those Physical changes. After a person dies, they need a continued tie to the Physical Realm to prevent passing to the Beyond after death. Someone with such a tie could become a Cognitive Shadow.