(Formerly Bloody Powerful) A subtrope of Super Empowering. John has one or more Stock Superpowers of the genetic and/or magical variety. He may have gained them from birth thanks to Superpowerful Genetics, genetic experimentation, or most likely Super Serum. Alternately, he has mystic powers in a setting where The Power of Blood and Blood Magic are very real, so his blood contains a measure of his magic. In short, his powers course through his blood in a very real sense. Suddenly, his friend Jack gets shot by one of his enemies, and has only minutes to live before even his copious blood supply runs out! Just by luck, Jack and John are the same blood type, and a quick emergency transfusion ensues... which quickly results in an Emergency Transformation. Thanks to the blood-borne nature of John's powers, Jack now has those same abilities! They might be temporary and last only as long as John's blood is in his system, or they may trigger a similar reaction in Jack's body and give him permanent (and potentially different) powers. It bears mentioning that in Real Life, blood transfusions in no way transfer the donor's genes into the recipient's DNA. The red and white blood cells last only a few months before dying without leaving a trace. Since Phlebotinum is involved, this is often ignored or justified by The Professor as John's blood "triggering" latent superpowers in Jack or causing the equivalent of a superpower-allergy. If John's powers are biological/genetic/chemical in nature, Jack getting these powers is often justified by The Professor explaining that the donation triggered dormant genes in Jack, or actually did somehow overwrite parts of his genome. If John's powers are magical in nature, then the reason Jack gets similar powers may have to do with Blood Magic. In these cases "John" might not even be the same species as Jack, such as a dragon or even vampire (of the mystical, non viral based types).
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