Yourself is a quest where you have to literally defeat yourself. You are the only enemy in the level, similar to the next Chuck Norris quest. The level consists of a plain area where the enemy (you) is standing in front of your starting area. Every action taken is mirrored by the enemy you meaning you die at the same time as it losing the quest, with exceptions (see below).
Upon beating it you advance and a single floor tile is left behind you.