Here is a new video from WhatCulture that lists the 10 worst things that Loki has done to Thor. Loki has existed in the Marvel comics realm since his first appearance in the Timely Comics' Venus #6, as a Olympic god exiled into hell. He didn't become the god of mischief and enemy of Thor until his official Marvel debut in Journey into Mystery #85 in 1962. From then on, he has been Thor's greatest foe and has been an all around mean guy towards the Asgardian god of thunder. Check out the video below and find out some of the bad things that Loki has done to Thor.