Firestorm Firestorm is a Super Heroes minifigure who appears in " " . Background . Comics . Ronnie Raymond was part of a group of demonstrators against a nuclear plant , but when he saw their leader tie Professor Martin Stein to leave him in an explosion , Ronnie refused to stoop to vandalism and murder , so he was also left there . The explosion didn ' t kill Ronnie and Stein , instead fusing them into a being named Firestorm , with the power of altering matter . Firestorm is mainly Ronnie , with Stein acting as a sort of " shoulder angel " . When not in action , Firestorm can split into Ronnie and Stein , so they can continue with their normal lives until needed . Firestorm works a member of the Justice League which also consists of Superman , Batman , Wonder Woman , The Flash , Green Lantern , Martian Manhunter , Cyborg and Aquaman . Batman : The Brave and the Bold . Jason Rusch was a 17 year old genius . On one fateful day , he and his dim - witted science teacher , Coach Ronnie Raymond were caught in a nuclear meltdown , caused by Dr . Double X , during an end of semester field trip to a nuclear test facility . Jason refused to leave Ronnie behind when his knee injury resurfaced . Both were fused together and granted superpowers . While Jason remained in control of his body , Ronnie ' s consciousness was transferred into Jason ' s mind but at times , he could also control the body . Jason struggled to cope with his new identity and powers but found comfort in the ability to alter the composition of any type of matter , the ultimate test of his will and imagination . After some training with Batman , the two decided to work together as a hero known as Firestorm . The Flash ( 2014 TV Series ) . Ronnie Raymond was a structural engineer for S . T . A . R Labs and the fiancee of Caitlin Snow . During the launch of the S . T . A . R . Labs particle accelerator , a malfunction occurred , and Ronnie entered the accelerator ring to manually redirect the explosion so that it would prevent serious damage to Central City , and in doing so , sacrificed his life in the process . At the same time , Dr Martin Stein , who had been working on the F . I . R . E . S . T . O . R . M . project , which focused on transmutation , was leaving S . T . A . R . Labs in order to escape from the potential explosion . When the accelerator exploded , Ronnie was carried by the dark matter wave , and fused with Stein . As a result of this , he gained abilities of fire and transmutation . However , the initial fusion between Ronnie and Stein was not stable , and they went into hiding until they were discovered by Dr Caitlin Snow . With help from The Flash , Cisco Ramon , Dr Caitlin Snow , and Harrison Wells , Ronnie and Stein learn to accept and control their abilities , and became the hero known as Firestorm . However , Ronnie was killed when he stopped a wormhole , though he was forcibly split from Stein . The Flash saved Stein , though Ronnie was killed . The Flash managed to find a replacement , Jefferson Jackson . Jefferson , or " Jax , " worked as a car mechanic in Central City and was initially reluctant , though he eventually decided to become the new form of Firestorm . Legends of Tomorrow . The new Firestorm eventually went on to join the Legends of Tomorrow alongside Captain Cold , Heat Wave , White Canary , Rip Hunter , Hawkman , Hawkgirl , and Atom . They traveled across time to defeat Vandal Savage and save Rip ' s family , though they were forced to let Rip ' s family die . Hawkman and Hawkgirl left the team to live in Central City . The Legends were scattered across time by Rip in order to prevent them from being killed by a nuclear bomb , but they were gathered by Steel and Green Arrow to prevent the Legion of Doom from stealing the Spear of Destiny . They succeeded with the help of Vixen , though they returned to a modern time riddled with time aberrations , or incorrect events in history . Rip , who had left the ship earlier , was the leader of the Time Bureau , a time organization . He was trying to hunt the Legends down for ruining the timeline , but the Legends escaped to fix time themselves . They saved the life of Zari Tomez , or Isis , and continued to fix the timeline . However , Rip decided to help them in order to find Mallus , an evil entity that had long been sealed away .