Speed Counters are only used in Turbo Duels. This kind of counter is used by "Speed World" and "Speed World 2". It enables for both players to gain Speed Counters on either one of each turns. The Speed Counters affect the actual speed of your Duel Runner. Most Speed Spells requires a minimum number of Speed Counters to be present, and some also require you to pay counters. These counters are referred to on the Duel Runner's display monitor as "SPC".