Son of two fathers and two mothers, Mordred was born of Susannah's egg fertilized by the seed of both Roland of Gilead and the Crimson King, and carried to term by Mia. Mordred is half-human, half-spider, able to transform between the two, and if his fate is fulfilled, he will both kill Roland and topple the Dark Tower itself. He is very powerful, yet extremely arrogant. His abilities include the ability to change between human form and spider form at will and absorbing a victim's knowledge and experience by devouring them. Neither the seers nor fate itself could protect Mordred from the death of magic in Mid-World as the Tower falters.