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Those blocks will start to appear into the underground Desert, turning any pure Hardened Sand Block into this counterpart. Like all other crimson blocks, it can spread the crimson to nearby tiles and placing enough of them can cause the biome-specific creatures to spawn. It's also possible to make the Desert Spirit spawn in, if there is enough of those blocks nearby. The block can be turned back to regular Hardened Sand if a Clentaminator with Green Solution is used on it.
- Added to the game.