An archaeologist discovers a talisman and gives it as a gift to his disabled son, who discovers it has the power to magically swap someone's medical condition for a corresponding superpower if it's touched in a certain spot, temporarily but infinitely renewably. For example, touching it might cause an asthmatic to gain the power of flight, someone with epilepsy the power to talk to animals, etc. He brings it to his special ed class at school and they all become super heroes and the talisman is the centerpiece of a saga filled with heroes imbued with acceptance while also being wishful in its story and addressing things other hero sagas don't.