Neck-ring

The is always generated with the  effect, causing its alternate name, the  to likely be more familiar to most players. However, the stains can be removed by using the interaction option in-game.

The neck-ring provides a significant boost to reputation with baboons, which usually prevents them from being hostile to the player. However, it is still possible for baboons to be hostile to the player while the player is wearing a neck-ring, such as if the player has exceptionally low reputation with baboons, or attacks a neutral baboon.

If a creature from the baboons faction is hostile to the player, and the player has a neck ring equipped, the creature will be inflicted with terrified for 2 rounds whenever they come within 5 tiles of the player.

Trivia

 * Despite its name, the neck-ring is typically worn on the arm.