For Whom the Bell Tolls
Galt lies to the north-west of the Shivering Sea and is one of the only habitable bodies orbiting a blue giant called False Hope.
The planet itself is mostly red rock and features large columns with flat plateaus.
Although Galt can sustain life, it is mostly barren and inhabited by wandering tribes.
The space marine Illdanach was summoned to one of the plateaus by a necromancer channeling through an ancient bolter.