New power

I feel horrendous pain then I see the demon it's says do you want power and do you want to live I've read about this before they will give you the power to kill anything but nobody can withstand I say yes if I don't I'll die anyway then I'm back in the wood the demon looks to be in fear and then I realize I survived I have all the power I need I can save millions now the demon is fading before he dies he says you have only 7 years to live after that your brain will explode enjoy the power he dies and I say that long enough to save the world but still kinda regret taking the power then I head back to the capital to report what's happened.