Fantastic Four: World's Greatest Heroes

During a confrontation with Diablo, Johnny is accidentally exposed to one of Diablo's potions he planned to use to gain control of all the elements. As the days go by, Johnny's powers seems to change. Diablo discovers that the essence of the fire elemental still lives within Johnny. Diablo starts making the power grow within him, so he can then claim it for himself. After Johnny seriously starts to lose control, Ben, Reed, and Sue try to capture him to figure out what's wrong. Sue continuously fights Johnny out into the city. Johnny knocks her out and is about to finish her, until he realizes that he actually hurt her. Johnny finally starts to come to his senses when he sees how he hurt her. Realizing that he is losing control of himself, he releases the energy, which forms into a giant fire being. Just then Diablo appears and sucks the Demon back into the magic goblet from which it came. Johnny starts to believe Diablo is a good guy, but just as fast Diablo goes back to his previous plan of taking control of the elements. He succeeds and gains control of the elements, Reed and Ben arrive with Reed's new invention a power disruptor designed to disrupt "whatever type of science Diablo is using" (Reed continues to deny the existence of magic, in spite to his inability to scientifically understand Diablo's power). Reed hits Diablo with the ray and he is stopped, and Reed yells "Take that Magic!". Diablo is defeated and everything goes back to normal.