Sheol Brick

Sheol Brick emerges in Book 3 as a macabre, high-efficiency fuel source crafted from the corpses of shriveled demon infants, prized for its intense, long-lasting burn. Its introduction marks a grim turning point in the crawlers' resource economy, transforming the remains of defeated enemies into a strategic asset. As the series progresses, Sheol Brick becomes emblematic of the dungeon's perverse alchemy—converting horror into power—and its use underscores the escalating moral and tactical complexities faced by Carl and his allies.