The first of its kind in Magic: The Gathering history, the Lorwyn Superblock refers to two different blocks which take place, one right after the other, on the same plane.
Consisting of the Lorwyn block (Lorwyn and Morningtide) and the Shadowmoor block (Shadowmoor and Eventide, the superblock tells the story of Lorwyn, a plane where humans don't exist.
Instead the major races are: