"Speed Spell" (Sp (スピードスペル) Supīdo Superu) is an archetype of Speed Spell Cards featured in the Yu-Gi-Oh! 5D's anime, as well as the video games Stardust Accelerator, Reverse of Arcadia and Over the Nexus. They are used in Turbo Duels, and are inherently linked to the "Speed World" series.