What is the perfect kill?

You could just stab someone in the ear with a large, sharp icicle. Let the evidence disappear when the weapon melts. Just make sure you have yourself covered, as to not leave evidence like dead skin cells, hairs, nails. Best to keep yourself masked in vaseline, and covered head to toe.

i would say by inviting  someone over to your house and than introduce them to a new drink or having them eat something that they like already that has a poison in it or something very lethal, that way you are kinda indirectly killing them without laying hands on them