How I Became An Immortal-A Prequel To An Immortal's Tale

It was the Roman times, A high noble I was, The city was under a rule of mimes, Passed to control, were silent laws. I travelled outside the city walls, For a really important trade, And suddenly my chariot stalls, In front of us was a blockade. The bandits swarmed over us, All my companions fled, So I was captured, thus, To their place, I was led. I was out cold, Woke up in a den, A lot of things, new and old, Were stolen by these men. A pot caught my eye, "Don't drink or suffer", it said, So in thirst, what I did, was not so wise, As from now on, I can't be dead. I realized this, but too late, When the bandits attacked, I escaped unharmed, Succumbed to my fate, From now on, never could I be harmed.