When the sliver of Voldemort's soul broke off after that fateful killing curse, it tried to latch onto the only living thing in the room - the baby Harry. But the protection in the child wouldn't stand anything that would wish ill will upon him and it cleansed the darkness from the shard before it would be permitted to attach. An unspoken promise was made with the magic of Lily Potter. Protect my son. Part of my series of Abandoned Plot Bunnies. Story is up for adoption. Discontinued/Abandoned Story.