Cure is Marle's 4th-level Tech in Chrono Trigger. It's yet another one of Marle's healing Techs, being significantly stronger than Aura.
Marle makes her casting pose, which involves her holding her hands together and her hair floating. Big, yellow sparkles circle in front of her and similar sparkles shower upon whom the Tech was cast on.
In its most powerful form, it heals for 999 HP - while its earlier counterpart, Aura, would only heal around 500 HP.