These r the next 3 types of people in the Cosmere (not races). Hemalurgists r people who practise Hemalurgy, the art of ruin. It i she the Hemalurgist drives a metal spike through a heart and then drives into the desired part of his/her body as to enhance that part. Like the Steel Inquisitor. World hoppers r people who use the Investiture (or magic) to jump from one place to another like teleportation. An example is the 17th Shard. Lightweavers r people or beings that can create optical illusions. I am not sure but I think there r a Knights Radiants faction known as the Lightweavers. Hoid is suspected to be one.