A few more notes on both feats and lore. Using the Crystal Heart, the Hollow Knight flies and create what looks like a sonic boom. Crystal Heart in action (around 17:09). The Traitor Lord and Mantis Traitors create what look like sonic booms with their attacks. Several enemies & obstacles fire beams of light. Said light is referred to as light, travels in a straight line, burns on contact and reflects & refracts. However, as far as I'm aware of, no one actually reacts to any of these attacks. An example of these light beams (around 20:32 in). Crystal ore energy is far less dangerous than soul energy. The Dream Realm is a plane beyond the material world (from the Hollow Knight manual). The Dream Realm exists between body and soul. The Dream Nail has the power to cut through the veil between Dream and the Waking World, though the Knight needs to restore its former power after first obtaining it. Using the Dream Realm, the Grimm Troupe traversed across lands and...