"Chrono Trigger" uses an "Active Time Battle" system—a recurring element of Square's "Final Fantasy" game series designed by Hiroyuki Ito for "Final Fantasy IV"—named "Active Time Battle 2.0". Each character can take action in battle once a personal timer dependent on the character's speed statistic counts to zero. Magic and special physical techniques are handled through a system called "Techs". Techs deplete a character's magic points (a numerical meter similar to hit points), and often have special areas of effect; some spells damage huddled monsters, while others can harm enemies spread in a line. Enemies often change positions during battle, creating opportunities for tactical Tech use. A unique feature of "Chrono Trigger"'s Tech system is that numerous cooperative techniques exist. Each character receives eight personal Techs which can be used in conjunction with others' to create Double and Triple Techs for greater effect. For instance, Crono's sword-spinning "Cyclone" Tech can be combined with Lucca's "Flame Toss" to create "Flame Whirl". When characters with compatible Techs have enough magic points available to perform their techniques, the game automatically displays the combo as an option.