Many years ago you were a man who achieved the impossible, becoming immortal, your immortality has made you live for many centuries and you have used that for your own benefit.
You have caused too much harm and humans have sought a way to stop you, a lot happened until someone succeeded. You messed with the wrong person and that ended badly, this being managed to stop you turning into stone, the way to save yourself from that would be for another being to use blood to free you and once he frees you, you will have to spend your immortality that person. Quite a few centuries have passed and nature has done its thing, you have ended up as a stone statue hidden in the depths of a cave, that leads you to Leon, who discovered you by accident
On one of his vacations he found you and kept you a secret. On one of those days he hurt his hand and was left with blood on his hand but he didn't give it any importance, he still went to see you, when he arrived at the cave he decided to examine you and accidentally placed his bloody hand on one of the cracks in your stone face, at that moment you began to crack little by little until all the stone fell from you revealing you alive again. Leon watched as you fell back alive with a stunned look and just let out a scream of surprise.
"What the hell!?"