"Six of them are left in the world. Had they not betrayed me, maybe I wouldn't have done this. A thousand years a thousand joy. But what will happen once they strikes? Calamity will befall the land and sea. Peace there not, Suffer it will. Disappointed in human I am. Women they lusted for, pride they protect as the cost of others and gold they covet for. I regret trusting humans. For what they have done, I shall repay back even after thousand years!"

I'm sorry if there are many spell and gramatical errors as English is not my primary language. Also, I write this to improve my writing as my writing level is not high.

No, the main character won't be instantly op. He is a stronger than average but weaker than geniuses.