It features a ghoulish green bun stuffed with a quarter pound of beef, a chicken fillet, cheese, bacon, and mayo.
Burger King claims the burger is "clinically proven to induce nightmares." The "Nightmare King" will be available at participating locations through November 1st.
The chain said they worked with experts to conduct a scientific study and determined those who ate the sandwich before bed had the incidence of nightmares increase over three times. The study's lead doctor claims the combination of protein and cheese leads to vivid dreams.