The Umbral “shadow” of a Shard Realm
Shade Realms are said to be reflections (or shadows cast on the Horizon) of Shard Realms. Shade Realms are doors to Shard Realms (but not the only way to get there). Shade Realms are inside the Horizon. Hollow Earth may be Shade Realm of Matter or inside it. Verbena Seasonal Realms may be in Shade Realm of Life. Shade Realm/Shard Realm of Life (Venus) in Infinite Tapestry pg. 121 is interesting. Dangerous wildlife gone wild.