Defender lvl 2 is an item held in the pocket slot while playing Barbarian Assault. It shows a player's defender level by creating a blue circle around them with the defender symbol and a gold Roman numeral 2. It cannot be removed or interacted with in any way besides examining it. When a game of Barbarian Assault finishes, the icon is removed.
Having level 2 in the Defender role increases the range in which penance monsters search for food.
The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!