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In the very first MCUIron Manmovie , Tony Stark ( Robert Downey Jr. ) builds a miniature bow reactor to keep his heart beating after a bomb explosion leaves his chest full of shrapnel . The nuclear reactor also power his Mark I Iron Man suit and facilitate him get out from his captors – but once Tony gets back to the U.S. , he builds a more advanced arc reactor and tells his assistant Pepper Potts to hold the original away .
Instead , Pepper places the living - saving machine in a glass box and engrave the Holy Writ , “ validation That Tony Stark Has A Heart ” on the arc reactor , revealing that she knows her boss is a decent human beings beneath his arrogant swagman . Her act turns out to be a life - save up one when Tony is forced to utilize the nuclear reactor to save his life after his treacherous partner Obadiah Stane steal his new one .
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The original arc nuclear reactor make a final visual aspect at the destruction ofAvengers : Endgameduring Tony ’s funeral when Pepper place it onto a bed of flowers and let it float forth in a flow . It ’s an excited fit that bring closure toIron Man ’s foresighted cinematic journey , but is it related to anything from Iron Man ’s comical account book roots ?
Actually yes – but only slimly . In the funnies , Tonydidbuild a gimmick to keep his philia beating after it was injure by shrapnel – but instead of being the sleek , compact arc nuclear reactor , it was a bulky thorax plate that he needed to wear at all times to keep himself alive . Like the arc nuclear reactor , the chest plate run as a bombardment for the eternal rest of Tony’sIron Man armour . Unlike the arc reactor , however , the chest collection plate turn tail low on power constantly , force Tony to keep plug away himself into wall socket to get a recharge . ( Considering the original comic script Iron Man armour was power by transistors , it ’s not surprising that the first battery was n’t that authentic ) .
Tony would eventually get a heart organ transplant using a particular “ synthetic tissue , ” negating his motive for the arc nuclear reactor ( much like the way MCU Tony had pump OR performed on him inIron Man 3 ) . This happen inIron Man # 19,fairly early in his life history , showing that Tony did n’t involve a special pacemaker for his heart as long as his MCU twin did . Tony would cover to have wellness problems , however , browse from alcoholism to palsy to a brainpower tumour . Yet while Tony was free of his nub precondition , heart issue would affect someone very near to him .
InThe Invincible Iron Man , Pepper Potts also meet an stroke that left life - threaten shrapnel inside her pectus . To save her life , Pepper was outfit with an arc reactor ( or magnetic stabilizer saucer ) of her own , which later powered her own causa ofIron Man armorand enabled her to become the armored paladin Rescue .
Thus , while the “ Proof That Tony Stark Has A centre ” arc nuclear reactor was a lovely memento that attend as a symbol for Tony Stark ’s rebirth into a more socially - conscious man , in the comic strip , his life - preserve gimmick basically toss out . Granted , Tony incline to save many of hisearlyIron Mansuits as trophies , indicating the original dresser denture could be gathering dust in some recess of Stark Industries , but it did n’t serve anywhere near an authoritative purpose as the MCU arc nuclear reactor did .
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