Starting from Being in Debt for 10,000 Years

My grandfather owes him ten thousand years. The creditor is called "Eternal Bank". They said if they couldn't pay it back, they would pay with their lives. I laughed. You probably don't know why my grandfather was able to owe this debt back then. I don't know what is hidden in the eye he left me. That's the only secret that can bankrupt the Eternal Bank. Ten thousand years of debt must be paid today. Not with my life, but with your rules.