I found one. After about ten years of pain, possessing creatures who never lived long, and waiting for a servant to arrive.. he came. Quirinus Quirrel, a foolish, gullible man I convinced at once to steal the Sorcerers Stone. He was the DADA teacher at Hogwarts... but when he failed to steal it out of Gringotts, I possessed him, I hid in his turban, he drank unicorn blood for me. And then...after nine months of hard work...we arrived in front of the mirror of Erised. And Harry Potter then arrived. He had the Stone, and when he touched Quirrel he crumbled like a stone... I was alone again.