Ring of Fire (also known as Fire Zone in the SNES/PS version) is a Triple Tech that is used by Crono, Robo, and Lucca in Chrono Trigger. It combines Cleave, Fire II, and Laser Spin to create a strong powerful tech.
In the attack, Crono and Robo begin executing Max Cyclone while Lucca slowly rises into the air and focuses her magic. She then sends a double dose of flames to the boys and ignites their bodies, turning Max Cyclone into a fire-elemental attack as rings of flames emit outward from them. Enemies adjacent to Robo receive a large amount of Fire damage.