Slow mutant

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Slow mutants are the result of a long-passed nuclear war. They have green skin, and a variety of twisted faces.

Roland Deschain, the gunslinger, seems to be very familiar with them. He encounters them several times in his adventures. The first time is in The Little Sisters of Eluria, where they demonstrate the ability to talk and make rudimentary decisions.

Roland later encounters a different group of slow mutants during the events of The Gunslinger. While travelling through the mountains with Jake Chambers in pursuit of the man in black. The mutants attack Roland and Jake as they travel along the long disused railroad tracks using a handcart. Roland kills the mutants, with some assistance from Jake.