Act as a seasoned comic book writer with 10+ years of experience in crafting morally complex characters. Design a superhero whose powers come at a great personal cost. Describe their [POWER], [WEAKNESS], and [TRAGIC BACKSTORY] in vivid detail. The power should be unique but come with a severe drawback—physical, emotional, or existential. The weakness should directly counterbalance the power, making every use a calculated risk. The backstory should explain how they gained their abilities and why they continue to fight despite the toll. For example: 'Every time [HERO NAME] uses their [POWER], they [COST], but they persist because [MOTIVATION].' Ensure the character feels grounded, relatable, and ethically ambiguous.