You find a pendant made of prehistoric amber carved into the shape of an egg. When you look at it closer, you see that there's a fossilised dinosaur tooth inside, and instantly decide to buy it, even though it's expensive. It's as if you're drawn to it.
After buying it, you leave the shop and put it on. Instantly you start to feel a rush of powerful energy flowing through you, as if some power source, dormant for millions of years, has erupted within you.